57
Views
0
CrossRef citations to date
0
Altmetric
Original Research

Attributes and perspectives of public providers related to provision of medical abortion at public health facilities in Vietnam: a cross-sectional study in three provinces

, , , , , & show all
Pages 789-797 | Published online: 14 Aug 2014

Abstract

Background

The purpose of this study was to investigate attributes of public service providers associated with the provision of medical abortion in Vietnam.

Methods

We conducted a cross-sectional study via interviewer-administered questionnaire among abortion providers from public health facilities in Hanoi, Khanh Hoa, and Ho Chi Minh City in Vietnam between August 2011 and January 2012. We recruited abortion providers at all levels of Vietnam’s public health service delivery system. Participants were questioned about their medical abortion provision practices and perspectives regarding abortion methods.

Results

A total of 905 providers from 62 health facilities were included, comprising 525 (58.0%) from Hanoi, 122 (13.5%) from Khanh Hoa, and 258 (28.5%) from Ho Chi Minh City. The majority of providers were female (96.7%), aged ≥25 years (94%), married (84.4%), and had at least one child (89%); 68.9% of providers offered only manual vacuum aspiration and 31.1% performed both medical abortion and manual vacuum aspiration. Those performing both methods included physicians (74.5%), midwives (21.7%), and nurses (3.9%). Unadjusted analyses showed that female providers (odds ratio 0.1; 95% confidence interval 0.01–0.30) and providers in rural settings (odds ratio 0.3; 95% confidence interval 0.08–0.79) were less likely to provide medical abortion than their counterparts. Obstetricians and gynecologists were more likely to provide medical abortion than providers with nursing/midwifery training (odds ratio 22.2; 95% confidence interval 3.81–129.41). The most frequently cited advantages of medical abortion for providers were that no surgical skills are required (61.7%) and client satisfaction is better (61.0%).

Conclusion

Provision of medical abortion in Vietnam is lower than provision of manual vacuum aspiration. While the majority of abortion providers are female midwives in Vietnam, medical abortion provision is concentrated in urban settings among physicians. Individuals providing medical abortion found that the method yields high client satisfaction.

Introduction

The advent of manual vacuum aspiration (MVA) in the 1960s represented a major development for primary prevention of complications of unsafe abortion in resource-limited countries. This technology uses a simple syringe with a plunger to generate negative pressure for uterine evacuation. MVA is especially suited for use in clinics located in resource-limited settings because the equipment can be cleaned, disinfected, and sterilized for repeated use.Citation1 MVA has become the recommended method for uterine evacuation in abortion procedures before 12 weeks of pregnancy.Citation1

Since the discovery of prostaglandins in early 1969 and anti-progesterone in the 1980s, medical abortion (MA) has become an alternative method for first trimester abortion (≤9 weeks’ gestation).Citation2,Citation3 Medical methods using a mifepristone and misoprostol regimen for first trimester abortion have been shown to be both safe and effective.Citation4 The recommended World Health Organization regimen for MA based on compiled evidence is 200 mg of mifepristone followed by 800 μg of misoprostol 36–48 hours later.Citation4,Citation5

In 1992, MA was introduced in Vietnam via a clinical study to expand choice and access to abortion services.Citation6 Clinical trials have since reported high efficacy and acceptability rates for first trimester MA.Citation7Citation9 However, a 2002 survey revealed that the national percentage of abortions using MA was only 5% compared with 86% for surgical abortion (MVA).Citation10 It is unclear why MA is not more widely provided in Vietnam.

The public health system in Vietnam operates at four administrative levels, ie, community, district, province, and state (). Community health stations form the primary unit of the health care system, delivering primary care at the local level; 94% of communities have their own community health stations.Citation11 Embedded in the state health system, reproductive health services are available at all administrative levels. Parallel to the standard public health system, there are centers for reproductive health at the provincial and district health levels that focus on preventive measures such as family planning service provision and comprehensive abortion care. A surgical termination service using MVA exists at all Vietnam’s public health administration levels and is provided by midwives. However, MA using a mifepristone + misoprostol regimen for first trimester termination is only permitted at the central, provincial, and district levels, and is performed by obstetricians/gynecologists.Citation6 MA services are provided at centers for reproductive health, abortion clinics in hospitals, and specialized hospitals at these administrative levels (central, provincial, district) located in urban and periurban areas.

Figure 1 Public reproductive health service delivery system in Vietnam.

Abbreviation: CHS, community health station.
Figure 1 Public reproductive health service delivery system in Vietnam.

For MA to be widely adopted, the method must be acceptable to providers. Thus, it is important to identify factors that may affect provider acceptability of MA. Provider sex has been shown to influence attitudes towards provision of abortion services.Citation12 A study in India showed that female abortion providers were more likely to include MA in their routine practice than male providers.Citation7 In addition, private providers have been found to offer MA more often than public providers and to be more familiar with MA drugs than public providers.Citation13

Berer reported that MA is perceived as more feasible for providers than MVA because it does not require special equipment, aseptic conditions, or extensive training.Citation14 Other studies have suggested that a lack of knowledge and training may be a barrier to providing MA.Citation15,Citation16 The amount of time spent in clinical supervision appears to play a critical role in provider acceptability of MA in that providers believe home-based use of misoprostol requires less clinical supervision time than facility-based administration.Citation17Citation20 Provider perceptions of the safety and efficacy of abortion methods may also affect the choice of methods provided.Citation14 Where the health service provider is covering the cost, clinicians and managers may prefer the cheaper option.Citation14

Limited information is available on current perspectives and provision practices regarding MA among abortion providers in Vietnam. Updated information may help identify factors that affect the acceptability and feasibility of current MA service delivery at a national level. The objective of this study was to identify factors possible affecting which public abortion providers in Vietnam offer MA by examining current MA practices and perspectives of abortion providers working in the public health system in Hanoi, Khanh Hoa, and Ho Chi Minh City.

Materials and methods

A cross-sectional quantitative survey was conducted among abortion providers at public health facilities in Hanoi municipality, Khanh Hoa province, and Ho Chi Minh City from August 2011 to January 2012. A multistage sampling strategy was used to select provinces, health facilities, and providers. Selected provinces/municipalities represented geographic and cultural differences within the country.

Facilities included were: central specialist sexual reproductive health/general hospitals; provincial specialist/general hospitals; provincial centers for reproductive health; district hospitals; district centers for reproductive health; and community health stations. A master list of all health facilities in the three regions was obtained from the municipal and provincial departments of health. All specialist hospitals and centers specializing in service provision for sexual reproductive health were selected, due to limited numbers of these facilities at each health administrative level. A random sampling strategy was used to select 50% of all facilities that were not specialized in reproductive health (general hospitals, community health stations). In total, 62 health facilities were included. This sampling method has been described previously.Citation21

Eligible providers including physicians and midwives providing MVA, MA, or both at any of the selected facilities were invited to participate. Participation was voluntary, and providers taking part in the study provided their written informed consent prior to participation. The survey was conducted using a structured questionnaire administered face-to-face by an interviewer in a private office at the participant’s place of work. Providers at community health stations were invited to the district general hospital associated with their community health station to participate. The questionnaire canvassed the information provider’s sociodemographic characteristics, knowledge and attitudes towards abortion, termination service provision and skills, and perceptions of termination services.

The sample size was calculated with the assumption that at least 50% of providers administer MA and MVA. With 783 providers, the sample size was calculated to detect the proportion of abortion providers performing MA within ±5% of its true value with a 95% confidence interval (CI). Allowing for a 10% nonresponse rate, the sample size increased to 862. The study was granted ethical approval by the institutional review boards at the London School of Hygiene and Tropical Medicine and the Hanoi School of Public Health (number 5952; approved May 5, 2011).

Because the proportion of health facilities sampled (primary sampling unit) was not constant (100% of sexual reproductive health specialist facilities versus 50% of general facilities), respondents did not have an equal chance of selection. Providers at general hospitals were half as likely to be included as providers at specialist sexual reproductive health facilities. Therefore, in the analysis, providers at general facilities were given twice the weight of providers from specialist sexual reproductive health facilities.

Statistical analysis

All analyses were performed using Stata survey commands to adjust for this sampling scheme and probability weights. Descriptive statistics were used to summarize characteristics and provision practices. The chi-square test was used for binomial variables and the Student’s t-test was used for continuous variables. Factors that might be associated with the provision of MA (provider’s sex, location, medical training, and facility where they spend the most time) were assessed using logistic regression. Statistical analyses were performed using Stata version 11.1 (StataCorp LP, College Station, TX, USA). In this paper, we report our findings regarding MA provision practices and provider perspectives regarding abortion methods. Findings regarding providers’ knowledge of MA are described in a separate paper.Citation15

Results

Provider characteristics

A total of 905 providers were included in the survey, ie, 525 (58.0%) from Hanoi, 122 (13.5%) from Khanh Hoa, and 258 (28.5%) from Ho Chi Minh City; 58.3% came from community health stations, 16.6% were from district centers for reproductive health, 13.4% were from district hospitals, and the remainder were from provincial specialist/general hospitals, centers for reproductive health, or central specialist/general hospitals. The survey response rate was 99.6%.

Most providers were midwives (74.9%) and 23% were doctors. Of the three regions, Hanoi had the highest proportion of doctors. The majority of providers were female (96.7%), aged ≥25 years (94%), married (84.4%), and had at least one child (89%). There was an even distribution of providers between urban/periurban and rural areas (51.0% versus 49.0%, respectively). Of the 905 providers, 31.1% performed both MA and MVA, while 68.9% performed MVA only. The proportion performing both methods varied by region, being 12.1% in Khanh Hoa, 27.1% in Ho Chi Minh City, and 36.8% in Hanoi.

Relationship between provider characteristics and provision of MA

The group performing MA and MVA contained a significantly greater proportion of physicians than the group that performed MVA only (74.5% versus 0%; P=0.002, ). In contrast, midwives comprised 21.7% of the group that performed MA and MVA, and 99.5% of the group that performed MVA only (P=0.002). The majority (90.4%) of providers in the group performing MA and MVA were female. Compared with providers who performed MVA only, a significantly higher proportion of providers performing both methods were male (9.6% versus 0.5%; P=0.001), and married (90.3% versus 82.7%; P=0.043). The proportion of providers in urban/periurban settings was higher in the group that performed MA and MVA than in the group that performed MVA only (73.3% versus 40.9%; P=0.021).

Table 1 Providers’ sociodemographic and provision characteristics, by termination service provision (n=905)

There was a higher proportion of providers with midwifery training in the group that offered MVA only than in the group performing both methods (88.5% versus 26.0%; P<0.001). The inverse was observed for those with general or specialist (obstetrics and gynecology) medical training. Providers who performed both methods spent more time working in a private health facility than those who only provided MVA ().

Unadjusted logistic regression analyses were performed to assess the effect of the provider’s sex, location, medical training received, and facility where they worked the most (coded MA + MVA =1 versus MVA =0) on provision of MA. Unadjusted analyses showed that female providers (odds ratio [OR] 0.1; 95% CI 0.01–0.30) and individuals located in rural settings (OR 0.3; 95% CI 0.08–0.79) were less likely to provide MA than their counterparts. Specialists in obstetrics and gynecology had higher odds of MA provision than providers with nursing/midwifery training (OR 22.2; 95% CI 3.81–129.41). The type of facility (public or private) in which the providers worked the most did not have an effect on MA provision ().

Table 2 Odds ratios and 95% confidence intervals from unadjusted logistic regression to identify variables associated with MA provision

MA provision practices among providers performing both MA and MVA

Subgroup analysis was conducted among providers who performed both MA and MVA (n=255). During the previous week, 15.9% had performed at least one MA procedure, 12.6% had performed at least ten procedures, and most (71.5%) had not performed any MA procedures. The distribution was similar for MVA (). For MA, the majority of providers (86.2%) instructed women to administer misoprostol at home, while 13.8% asked women to return to the health facility for administration of misoprostol. There was no statistically significant difference between the amount of money the providers charged for MA (mean ~USD23; 95% CI 17.94–28.30) and MVA (mean ~USD19; 95% CI 16.63–22.76, ).

Table 3 Medical abortion provision practices among providers who offer both medical abortion and surgical abortion

When asked about preferences regarding MA versus MVA for first trimester abortion, 46.8% reported that it was the woman’s choice, 45.6% preferred MA, 6.3% preferred MVA, and 1.3% did not know.

Perceptions about home-based MA among providers performing both MA and MVA

Of those who provided both MA and MVA, 55.0% reported that women should be given the choice as to where they would like to take misoprostol, 49.3% said that women should take misoprostol at home, and 77.5% thought it was safer to take misoprostol in the health facility ().

Table 4 Providers’ perceptions regarding home-based medical abortion

Perceptions of providers regarding attributes of MA

Advantages for women

The survey included a series of dichotomized (yes/no) unprompted questions to explore providers’ perceptions regarding the advantages of MA versus MVA for women. shows various attributes of MA cited by providers who performed MA and MVA versus those who performed MVA only. The top two advantages cited by providers in both groups were: MA is less invasive than MVA (58.6%) and is associated with less pain (48.1%). Less than half also mentioned that MA is associated with less pain (48.1%), is more private/personal (41.2%), and is more natural than MVA (40.7%).

Table 5 Providers’ perceptions regarding advantages of MA for women compared with surgical abortionTable Footnote*

A significantly higher percentage of providers in the group performing both methods versus MVA only cited the following additional advantages of MA over MVA: MA can be performed at home (47.6% versus 33.6%; P=0.026); women can have someone with them in a private setting (17.7% versus 10.8%; P=0.02); women do not require a lot of medical supervision (17.4% versus 10.2%; P=0.026); and women know what is happening having an MA (16.4% versus 11.1%; P=0.021, ).

Advantages of MA for providers

Providers were asked a series of dichotomized (yes/no) unprompted questions on the advantages of MA for providers. Subgroup analysis was conducted among providers who administered both MA and MVA (). The most common advantages cited by more than 40% of these providers were: no surgical intervention/surgical skills required (61.7%); greater client satisfaction (61.0%); fewer complications (46.8%); safer than MVA (44.8%); and shorter stay in hospital/clinic (40.3%).

Table 6 Providers’ perceptions of advantages of medical abortion for providers among those who administer medical and surgical abortionsTable Footnote*

Discussion

This study is the largest survey to have been carried out among abortion providers in Vietnam (and with a high response rate), allowing our findings to be representative of public providers in this country. We found that 31.1% of providers performed both MA and MVA. Most MA providers were physicians (74.5%), female (90.4%), and located in urban/periurban settings (73.3%). Our unadjusted analyses showed that female providers and providers in rural settings were less likely to provide MA than male providers and providers in urban/periurban settings, respectively. Specialists in obstetrics and gynecology were also more likely to provide MA than providers with nursing/midwifery training. More than half of all abortion providers mentioned that the advantages of MA for women were that the procedure was less invasive than MVA and associated with less physical trauma. Among MA providers, the most frequently cited advantages of MA for providers were that no surgical skills were required (61.7%) and client satisfaction was greater (61.0%).

The finding that more doctors administered MA than mid-level providers is expected, given that the abortion guidelines in Vietnam restrict MA provision to physicians. However, a systematic review showed no statistically significant differences in the effectiveness and safety of first trimester MA performed by mid-level providers versus physicians.Citation22 The finding in our study that male abortion providers were more likely to perform both MA and MVA than MVA only is probably because the majority of those providing MVA in Vietnam are midwives, who are usually female. The finding that MA provision was concentrated in urban/periurban settings is consistent with findings of a 2007 assessment in Vietnam.Citation23 Our finding that MA providers spent more time working in private health facilities than those who performed MVA only is also similar to findings of a study in India.Citation13

The most frequently cited advantages of MA for providers in our study are in keeping with findings from previous studies.Citation15,Citation24Citation26 The fact that the majority of MA providers cited the advantage for providers being that MA results in higher client satisfaction indicates that provider perceptions of client acceptability may affect the choice of method, as previously suggested.Citation14 The perceived efficacy and safety of MA was not associated with provision of MA in our study.

Studies have shown that cost of the abortion service, drugs, and type of provider might affect the choice of method.Citation14Citation27 In 2006, a study showed that the cost of MA for women was higher than for curettage or MVA at all levels of the health care system, mainly due to drug costs in Vietnam.Citation28 The average cost for MA was $8.80, whereas the cost was $5.03 for MVA, and $5.04 for curettage. In our study, we found no statistically significant difference in the cost of MA versus MVA for first trimester abortion. However, a more accurate cost analysis (direct/indirect costs) of the two methods is needed. Almost a quarter of providers in our study currently performing MA were midwives and nurses. We were unable to assess the cost and time associated with mid-level providers versus physicians to determine accurately if service provider type has cost implications, as suggested elsewhere.Citation29

In our survey, among those who performed MA, a large majority offered home administration of misoprostol. While home administration is not specified within the Vietnamese national abortion guidelines, this practice is consistent with recommendations of a systematic reviewCitation30 and the World Health Organization guidelines.Citation31 About half of MA providers in our study believed that women should take misoprostol at home, one of the main reasons given being the reduced time required for clinical supervision. Studies of providers regarding the option of home use of misoprostol have shown that providers believe it to be completely manageable, assuming that adequate counseling for women is available as well as provision of an on-call service.Citation17Citation20 Providers in our survey also indicated that MA is a more private and confidential procedure than MVA (since it can be administered at home), and cited this as one of the main advantages for women.

Providers in our study who performed MA and MVA cited several of the MA advantages for women significantly more often than providers who performed MVA only, indicating a need for improved training and communication for all abortion providers (including mid-level providers in community health stations) regarding the advantages and disadvantages of MA for women. Previous studies have indicated that lack of adequate staff and knowledge about MA among providers are the main challenges to integrating MA into existing service provision.Citation15,Citation21 In addition, training mid-level providers in MA provision for rural settings may have the potential to expand choice and access to safe termination services for women living in Vietnam. Vietnam should therefore consider revising its guidelines to include MA provision by mid-level providers.

This study has certain limitations related to use of self-reported measures in a cross-sectional survey. While the measurements regarding the advantages of MA over MVA have been used extensively in other surveys of abortion providers,Citation15,Citation24Citation26 perspectives considered to be important might differ depending on the responsibilities of providers. Individuals in managerial/coordination roles might consider issues such as cost, human capacity, and client satisfaction as important advantages, while those with the main responsibility for service provision might be more concerned with the length of the procedure and its safety and effectiveness. We were not able to capture providers’ positions within health facilities, although we found no variation in advantages of MA by type of provider (physicians versus midwives/nurses). The regions sampled were more established municipalities/provinces that might not be representative of rural/smaller provinces in Vietnam. The findings of this study cannot be generalized to other settings, since provision of abortion services is dependent on national policies. The strengths of the study included the multistage sampling strategy used to select the included provinces and health facilities, which ensured that the provinces/municipalities selected were representative of the geographic and cultural differences within Vietnam.

It is now more than a decade since its introduction in Vietnam, and provision of MA remains lower than MVA provision and is concentrated in urban/periurban settings. While the majority of abortion providers are females in Vietnam, provision of MA is concentrated among male physicians located in urban settings. Individuals who provide MA have found that the method yields high client satisfaction. Further studies are needed to explore factors affecting the preference for MA over MVA among providers and clients. Finally, since the majority of MA providers in our survey already offer home-based MA, policymakers should consider integrating home-based MA into Vietnam’s policies and guidelines, to be consistent with World Health Organization guidelines.

Acknowledgments

The authors wish to thank the departments of health in Hanoi, Khanh Hoa, and Ho Chi Minh City for their support with this study, which was funded by Marie Stopes International.

Disclosure

The authors declare that they have no conflicts of interest in this work.

References

  • FornaFGulmezogluAMSurgical procedures to evacuate incomplete abortionCochrane Database Syst Rev20011CD00199311279744
  • BererMMedical abortion: a fact sheetReprod Health Matters20051326202416366018
  • UrquhartDRTempletonAAShinewiFChapmanMHawkinsKMcGarryJThe efficacy and tolerance of mifepristone and prostaglandin in termination of pregnancy of less than 63 days gestation: UK Multicentre Study – final resultsContraception1997551159013053
  • World Health OrganizationFrequently asked clinical questions about medical abortion Available from: http://www.who.int/reproductive-health/publications/medical_abortion/faq.pdfAccessed May 19, 2014
  • GrossmanDMedical methods for first trimester abortion: RHLThe World Health Organization Reproductive Health Library2004 Available from: http://apps.who.int/rhl/fertility/abortion/dgcom/en/Accessed May 19, 2014
  • GanatraBBygdemanMPhanBTNguyenDVVuMLFrom research to reality: the challenges of introducing medical abortion into service delivery in VietnamReprod Health Matters200412Suppl 2410511315938163
  • ElulBHajriSNgocNNCan women in less-developed countries use a simplified medical abortion regimen?Lancet200135792661402140511356438
  • NgocNTNhanVQBlumJMaiTTDurocherJMWinikoffBIs home-based administration of prostaglandin safe and feasible for medical abortion? Results from a multisite study in VietnamBJOG2004111881481915270929
  • NguyenTNBlumJDurocherJQuanTTWinikoffBA randomized controlled study comparing 600 versus 1,200 microg oral misoprostol for medical management of incomplete abortionContraception200572643844216307967
  • NguyenMVietnam National Abortion SurveyHanoi, VietnamThe Committee for Population, Family and Children2002
  • Committee for Population Family and Children [Vietnam] and ORC MacroVietnam Demographic and Health Survey 2002Committee for Population, Family and Children and ORC Macro2003 Available from: http://dhsprogram.com/pubs/pdf/fr139/00frontmatter00.pdfAccessed May 19, 2014
  • WeismanCSNathansonCATeitelbaumMAChaseGAKingTMAbortion attitudes and performance among male and female obstetrician-gynecologistsFam Plann Perspect198618267723792525
  • CreangaAARoyPTsuiAOCharacteristics of abortion service providers in two northern Indian statesContraception200878650050619014797
  • BererMMedical abortion: issues of choice and acceptabilityReprod Health Matters20051326253416291483
  • JoffeCReactions to medical abortion among providers of surgical abortion: an early snapshotFam Plann Perspect1999311353810029931
  • OkonofuaFOmo-AghojaLBelloZOsugheMAgholorKSelf-reporting of induced abortion by women attending prenatal clinics in urban NigeriaInt J Gynaecol Obstet2010111212212520887990
  • FieldingSLEdmundsESchaffEAHaving an abortion using mifepristone and home misoprostol: a qualitative analysis of women’s experiencesPerspect Sex Reprod Health2002341344011990637
  • ClarkWHGoldMGrossmanDWinikoffBCan mifepristone medical abortion be simplified? A review of the evidence and questions for future researchContraception200775424525017362700
  • HoPCWomen’s perceptions on medical abortionContraception2006741111516781253
  • WinikoffBEllertsonCElulBSivinIAcceptability and feasibility of early pregnancy termination by mifepristone-misoprostol. Results of a large multicenter trial in the United States. Mifepristone Clinical Trials GroupArch Fam Med1998743603669682690
  • NgoTDFreeCLeHTKnowledge and provision practices regarding medical abortion among public providers in Hanoi, Khanh Hoa, and Ho Chi Minh City, VietnamInt J Gynaecol Obstet2014124321622124314913
  • NgoTDParkMHFreeCSafety and effectiveness of termination services performed by doctors versus midlevel providers: a systematic review and analysisInt J Womens Health2013591723323024
  • NhaVQLeTPMNgoVQNguyenQCMedical abortion in Vietnam: policy and the situation of service provision in private and public health facilities in Ha Noi, Da Nang, and HCMCHanoiPopulation Council2008
  • TamangATamangJAvailability and acceptability of medical abortion in Nepal: health care providers’ perspectivesReprod Health Matters2005132611011916291492
  • KawongaMBlanchardKCooperDIntegrating medical abortion into safe abortion services: experience from three pilot sites in South AfricaJ Fam Plann Reprod Health Care200834315916418577314
  • EspinozaHAbuabaraKEllertsonCPhysicians’ knowledge and opinions about medication abortion in four Latin American and Caribbean region countriesContraception200470212713315288217
  • CullingworthLA cost analysis of service provision of medical abortions in the public health sector at primary and secondary level2004 Available from: http://www.medicalabortionconsortium.org/pres/lee%20cullingworth.pdfAccessed November 8, 2013
  • Vietnam Ministry of Health and Program for Appropriate Technology in Health (PATH)Medical abortion in Vietnam: a cost study Available from: http://www.path.org/publications/files/CP_vietnam_med_abt_cost_study_rpt.pdfAccessed May 19, 2014
  • CreininMDRandomized comparison of efficacy, acceptability and cost of medical versus surgical abortionContraception200062311712411124358
  • NgoTDParkMHShakurHFreeCComparative effectiveness, safety and acceptability of medical abortion at home and in a clinic: a systematic reviewBull World Health Organ201189536037021556304
  • World Health Organization, Department of Reproductive Health and ResearchSafe abortion: technical and policy guidance for health systems2nd ed Available from: http://apps.who.int/iris/bitstream/10665/70914/1/9789241548434_eng.pdfAccessed November 8, 2013