76
Views
0
CrossRef citations to date
0
Altmetric
Review

Equipping pharmacists for delivering pharmaceutical care to seniors: a qualitative systematic review of Asian seniors’ social support

ORCID Icon, , , &
Article: 75 | Received 16 Mar 2023, Accepted 04 Jun 2023, Published online: 11 Mar 2024

Abstract

Background

Pharmacists must cater to seniors’ needs and communicate better in delivering pharmaceutical care. However, pharmaceutical care for seniors is unique since they commonly depend on support from their social environment. Our study aimed to collect perceptions and experiences of Asian seniors regarding social support.

Methods

A qualitative systematic review of peer-reviewed articles between January 2012 and January 2022 was conducted using PubMed, Scopus, Academic Search Complete via EBSCOhost, ProQuest, and Google Scholar. Selected studies were extracted, and thematic synthesis was performed.

Results

A total of 23 qualitative studies with diverse rigor were included in this review. Themes that emerged around perceptions and experiences of social support were (1) family orientation, (2) having faith in religion, (3) the importance of the elderly providing support, (4) taboos, (5) elderly self-reliance, (6) elderly fear of being a burden, and (7) differences on perceptions and experiences regarding social support. A discussion on how these results may contribute to pharmacy practice is provided.

Conclusion

This study reviews the available social support for seniors and highlights its importance for pharmacists.

Supplementary Information

The online version contains supplementary material available at https://doi.org/10.1186/s40545-023-00576-7.

Background

The role of pharmacists in providing pharmaceutical care for seniors is rising due to an aging population worldwide. The global population aged 60 and over reached 1 billion in 2019 and was estimated to increase to 2.1 billion in 2050 [Citation1]. Nevertheless, those aged 60 and over are generally prone to develop medication‐related problems, such as adverse drug reactions [Citation2], poor adherence to therapy, and inappropriate drug selection [Citation3], because of several health conditions and the use of poly-medication to control their comorbidities. This condition challenges pharmacists to provide more patient-oriented pharmaceutical services.

Providing pharmaceutical care for seniors differs from other populations. It needs more comprehension, with proficiency not only in the clinical aspects but also in the social context in which the pharmaceutical service is delivered [Citation4, Citation5]. For instance, to improve treatment adherence and prevent medication-related problems, pharmacists must not only know the pharmacokinetic–pharmacodynamic changes in seniors but also notice the need for and availability of family and neighborhood support.

Social support is one of seniors' most important social determinants of health [Citation6, Citation7]. It is defined as “an exchange of resources between two individuals perceived by the provider or the recipient to be intended to enhance the well-being of the recipient” [Citation8]. The types of support are usually emotional, instrumental or tangible, informational, and appraisal [Citation9]. The expression of emotional caring or concern, the instrumental aid, the provision of advice and guidance, and the encouragement to take opportunities are examples of each type of social support subsequently [Citation10, Citation11].

It is known that seniors are in greater need of social support than adults, regarding not only receiving but also providing support [Citation12]. Social support is important because later life is related to stressful events such as health problems, a close person’s illness or death, and loss of sources of income [Citation13]. With declining physical and mental capacities leading to geriatric syndromes, many seniors also need informal support in medication management activities, such as obtaining medications, preparing pill boxes, assisting in medication administration, organizing and tracking medications, collecting information, and making treatment decisions [Citation14].

However, it is also known that cultural differences play an important aspect in social support [Citation15]. In Asia, seniors rely on their children and family members for care in old age. Multigenerational co-residence and extended family practice are also prevalent in many Asian countries [Citation16].

Previous quantitative studies have shown that social support was essential to medication adherence in the senior population [Citation17Citation20]. However, there was scarcely discussion on how seniors perceived and received social support and how understanding that support could equip pharmacists for their practice. Knowledge of social support from the perspective of Asian seniors could help pharmacists appreciate the nature of seniors’ social environment to provide pharmaceutical care that meets their needs, especially in the Asian pharmacy practice. Accordingly, we aimed to collect all available qualitative evidence and use individual qualitative data. The following research question was formulated: What themes emerged around social support from the perspective of Asian seniors?

Methods

Design, protocol registration, and reporting

This study was conducted as a qualitative systematic review. The protocol was registered in PROSPERO (CRD42022301602). The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) [Citation21] flow chart was used for the search process, and the Enhancing Transparency in Reporting the Synthesis of Qualitative Research (ENTREQ) statement [Citation22] was used to guide a more specific reporting of a qualitative systematic review.

Data sources and search strategy

PubMed, Scopus, Academic Search Complete via EBSCOhost, ProQuest, and Google Scholar were searched using predetermined search concepts and related terms (Table ).

Table 1 Article search concepts and corresponding terms

We define social support as emotional, instrumental, informational, and appraisal support perceived or received by the elderly [Citation9]. We did not limit the search to the concept of pharmacist or medicine to obtain a greater possibility of social support studies (pre-planned). Therefore, the reviewers involved were medical sociologists, geriatricians, and pharmacists.

Eligibility criteria

Full-text and peer-reviewed studies with Asian seniors as participants (60 years or older) living in Asian countries, aimed at exploring perception and experience about social support or resulting in any perception and experience regarding social support, published in English, from January 2012 to January 2022, were sought. We included any settings (community, healthcare, nursing homes) and a wide range of health conditions (physical and mental health, well-being) of the participants but excluded cognitive impairment since the condition would affect perceptions or conveying experiences of seniors. Qualitative data were defined as first-order (participants’ quotes) or second-order constructs (researcher interpretation, statements, assumptions, and ideas) [Citation23]. Therefore, a mixed-method study would be included for the qualitative parts. We also excluded study protocols, reviews, comments, editorials, and qualitative evaluations of a social support intervention.

Study selection and extraction

All titles and abstracts retrieved from the database searches were sent to the Mendeley reference manager. After removing duplicates, two team members altogether screened all titles and abstracts to identify studies that could meet the inclusion and exclusion criteria. The full texts of potentially eligible studies were retrieved, assessed, and extracted independently using a data extraction sheet.

Quality assessment

The quality of the included studies was evaluated independently by two team members using the Critical Appraisal Skills Programme (CASP) appraisal tool for qualitative research [Citation24]. Differences of opinion were resolved by consensus. We assessed the included studies for the scope and purpose, design, reflexivity, ethical consideration, analysis and interpretation, and transferability [Citation25] to describe the rigor of the studies. We added a percentage of the + (answer yes) after each CASP 10-question to summarize the study appraisal. This summary would not be a reason to exclude the already included study.

Data synthesis

Two team members conducted a thematic synthesis with an inductive approach that consists of three stages: the free line-by-line coding of the findings of primary studies, the organization of these free codes into related areas to construct descriptive themes, and the development of analytical themes [Citation26]. All the texts labeled as Results or Findings in the included study were entered verbatim into QSR’s NVivo 12 Pro software for qualitative data analysis. The lines of text from a study were coded according to their meaning. The lines of text from the next studies were then coded into pre-existing or new codes. Descriptive themes were created to capture the essence of groups of initial codes. Analytical themes were then made from a group of descriptive themes to address the perceptions and experiences of social support. These stages were dependent on the judgment and insights of the reviewers. To address the heterogeneity of the included studies, we stratified the studies by settings and then identified settings of primary studies that constitute themes.

Results

Characteristics of the included studies and quality assessment

Twenty-three studies were included in this review after a search utilizing the PRISMA chart (Fig. ). The total number of seniors who participated in the included studies was 527 individuals aged 60–94. Table provides the relevant study characteristic data for the 23 included studies. The studies initially might not seek experience or perception of seniors regarding social support, but the themes obtained as the results were about support in various circumstances. Additional file 1 summarizes the quality assessment of the included studies.

Fig. 1 PRISMA chart

Fig. 1 PRISMA chart

Table 2 Characteristics of included studies (stratified by settings)

Perceptions and experiences of Asian seniors regarding social support

We identified seven analytical themes on how Asian seniors perceive and experience social support: (1) family orientation, (2) having faith in religion, (3) the importance of the elderly providing support, (4) taboos, (5) elderly self-reliance, (6) elderly fear of being a burden, and (7) differences on perceptions and experiences regarding social support. The first analytical theme, “family orientation,” was prominent since 22 out of 23 studies showed experiences and perceptions of support for family [Citation27Citation48]. This analytical theme was built upon many descriptive themes and codes which showed that family almost always be the directions or underlying view of mind. The second analytical theme, “having faith in religion,” was also prominent since 17 of 23 articles showed experiences and perceptions of support for seniors’ religious faith [Citation27, Citation28, Citation32Citation39, Citation41Citation43, Citation45Citation47, Citation49]. Table provides the themes, examples of quotations, and settings of primary studies that constitute themes.

Table 3 Themes, example of quotations, and settings of primary studies that constitute themes

Although Asian seniors were thought to rely on family, some included studies provided the perspectives of seniors who have no family or live without family. They tend to act practically than rely on praying [Citation27] or choose nursing homes as their “homes” [Citation49]. However, younger seniors, in good physical condition and capable of self-care, prefer home-based care rather than institutionalized care. Those who find it difficult to live alone intend to receive supportive care from society [Citation31].

Most included studies also discussed faith or spiritual support. Many Asian seniors have a deep faith in religion which is a significant source of strength when facing life stressors [Citation43]. However, although social support generally assists seniors positively, sometimes that support provides a negative experience, such as disrespect [Citation32, Citation33, Citation43] or feeling of being a burden [Citation43, Citation46, Citation47].

Discussions

Understanding how family and religious faith support (or unsupported) seniors might sensitize pharmacists to psychological and sociological factors that might be subsequently involved in medication taking and health-related behaviors. It is known that patient survival is improved when social and emotional factors are explicitly considered by healthcare providers [Citation50]. Moreover, understanding social support would improve pharmacist communication, which previously noted as ineffective two-way communication between pharmacist and patient [Citation51]. Since the nonadherence problems are located within the inefficient communication process or in the lack of rapport with patients [Citation52], improving communication might improve patient adherence.

Assessing whether seniors have appropriate family support is the most important since family or relatives will assist seniors in adhering to and benefiting from treatment recommendations. Some studies indicated pharmacists should understand that family members are essential to patients’ medication [Citation33, Citation48]. A study in Thailand also revealed that elderly individuals with a daughter as a caretaker were approximately eight times more likely to adhere to their antihypertensive treatment than patients with no caretaker [Citation53].

However, there is an increasing trend of seniors living alone in Asia, such as Japan, South Korea, and Taiwan [Citation54]. Nevertheless, living alone does not necessarily mean no family support because nonresident family members can still provide support [Citation55]. For seniors living in households separate from family members, pharmacists might help these seniors maintain their independence. Pharmacists should be aware that seniors expect to be self-reliant and not to be a burden to anyone.

Religious or spiritual support might correspond with medication use and adherence. Pharmacists may encounter scenarios and circumstances where communication about faith becomes necessary, such as discussing chronic disease management in religious communities. Because believing in a higher power enables seniors to face difficult times with an optimistic and resilient attitude [Citation37], pharmacists should not go against this faith. Instead, encouraging seniors to develop self-reflexivity through communication might promote better adherence.

Other things to be considered are that receiving and providing support is also crucial for seniors [Citation37]. Being involved and active in any community, such as a church community [Citation45], would make seniors feel useful as they can provide emotional support and friendship to others, share information and encouragement [Citation32], and remain active as long as possible. A previous study even proved that providing social support for elders is more important than receiving it [Citation12]. To address this need, there are usually ranges of communities a pharmacist can suggest to seniors, from neighborhood-based to hospital-based communities.

Pharmacists must understand taboos and other sensitive issues around seniors’ conditions. Discussing death with seniors might be considered taboo [Citation45], but pharmacists involved in end-of-life and palliative care would eventually encounter this conversation with seniors. Pharmacists must also know that discussing seniors’ needs would be challenging as imposing needs and problems on others might also be considered inappropriate, as the included studies indicated [Citation37, Citation41].

However, seniors’ perceptions and experiences regarding social support may vary across regions and circumstances. The included studies indicated that younger-old, male, or living with a family will have different needs or perspectives than older-old, female, or having no family. Tailoring the health education message to the needs of seniors would be more helpful. Patients take information and process it within their cognitive framework based on their interpretation of their own experiences [Citation4]. Thus, even seniors would act differently and selectively based on their needs and circumstances.

Implication for pharmacy practice

Improving pharmacist communication with seniors is the central recommendation from this review. The authors suggest points that might be incorporated into a standard procedure of pharmacist communication with seniors, such as ensuring the availability and ability of social support as well as assessing faith and beliefs related to medicine or health behavior. Since it is common in Asian culture to greet and ask about the condition of somebody’s family and relatives, it might be easier for pharmacists to do this communication. It will give insight into how pharmacists may involve any support available for individual seniors. For example, for independent seniors, it might be appropriate to ensure that their medication self-management at home is correct and to encourage them to be active in the community; for more dependent seniors who live with family members, it might be appropriate to educate through their family; or for seniors who live without family, it might be appropriate to ensure the availability of nearby relatives or neighbors to take them to regular check-ups, and so on.

Strength and limitations

From the pharmacy perspective, this review gives insights into pharmacist communication approach to elderly patients. Nevertheless, this review had some limitations. First, as a qualitative synthesis, data retrieved were thrice removed, which means we interpreted the experiences and perceptions that the original researchers interpreted from the interpretation of the seniors themselves as study participants [Citation56]. We were not in the place and context when the primary data were collected, but rather we discussed the data in a quite diverse expertise background of reviewers. Second, we only included articles in English; there might be other comprehensive studies from Asia using non-English languages. Third, the search strategy in this review was not directly associated with pharmacy or medicine, but our discussion attempts to link the available evidence about social support with pharmacy practice.

Conclusions

The present review affirmed the evidence from Asian seniors that they are more affected by family support and religious faith. Pharmacists should incorporate family and religious faith approaches in communication with seniors for an effective pharmaceutical service.

Author contributions

SS, CW, NNW, and RSP developed the concept and search strategy. NNW conducted the retrieval and data extraction. NNW and RSP did thematic synthesis. CW and NNW conducted critical appraisals. NNW drafted the manuscript. SS and P added the draft into the agreed final version of the manuscript.

Declarations

Ethics approval and consent to participate

An ethics approval number was not required as this study did not include any confidential participant data and interventions.

Consent for publication

Not applicable.

Competing interests

The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

Supplementary Information

Abbreviations

PRISMA=

Preferred Reporting Items for Systematic Reviews and Meta-Analyses

ENTREQ=

Enhancing Transparency in Reporting the Synthesis of Qualitative Research

CASP=

Critical Appraisal Skills Programme

Supplemental material

jppp_a_12370128_sm0001.docx

Download MS Word (18.5 KB)

jppp_a_12370128_sm0002.docx

Download MS Word (18.1 KB)

Acknowledgements

The authors would like to thank Faculty of Pharmacy Universitas Gadjah Mada for the license of QSR's NVivo 12 Pro software. The authors would like to thank Enago (www.enago.com) for the English language review.

Funding

This study was supported by Universitas Gadjah Mada.

Availability of data and materials

All data for analysis in this review is in the public domain.

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

References

  • United Nations Department of Economic and Social AffairsWorld population ageing 20192020New YorkUnited Nations
  • Lampela P, Hartikainen S, Sulkava R, Huupponen RAdverse drug effects in elderly people–a disparity between clinical examination and adverse effects self-reported by the patientEur J Clin Pharmacol2007635509515 17351768
  • Cárdenas-Valladolid J, Martín-Madrazo C, Salinero-Fort MA, Carrillode-Santa Pau E, Abánades-Herranz JC, de Burgos-Lunar CPrevalence of adherence to treatment in homebound elderly people in primary health careDrugs Aging2010278641651 20658792
  • Wertheimer AI, Smith MC. Pharmacy practice: social and behavioral aspects third edition. Williams & Wilkins; 1989.
  • Taylor K, Nettleton S, Harding G. Sociology for pharmacists second edition. 2003.
  • Al-Kandari YY, Crews DESocial support and health among elderly KuwaitisJ Biosoc Sci2014464518530 24229533
  • Bai Y, Bian F, Zhang L, Cao YThe impact of social support on the health of the rural elderly in ChinaInt J Environ Res Public Health20201762004 32197415 7143868
  • Shumaker SA, Brownell AToward a theory of social support: closing conceptual gapsJ Soc Issues19844041136
  • Tengku Mohd TAM, Yunus RM, Hairi F, Hairi NN, Choo WYSocial support and depression among community dwelling older adults in Asia: a systematic reviewBMJ Open201997 31320348 6661578
  • Dykstra PRitzer GAging and social supportThe blackwell encyclopedia of sociology2015John Wiley & Sons Ltd
  • Scheurer D, Choudhry N, Swanton KA, Matlin O, Shrank WAssociation between different types of social support and medication adherenceAm J Manag Care20121812e461e467 23286676
  • Zanjari N, Momtaz YA, Kamal SHM, Basakha M, Ahmadi SThe influence of providing and receiving social support on older adults’ well-beingClin Pract Epidemiol Ment Heal2022181
  • Herrera MS, Fernández MBStressful events in old age: who are most exposed and who are most likely to overcome themGerontol Geriatr Med20201619
  • Look KA, Stone JAMedication management activities performed by informal caregivers of older adultsRes Social Adm Pharm2018145418426 28528023
  • Zheng S, Masuda T, Matsunaga M, Noguchi Y, Ohtsubo Y, Yamasue H, et al.Cultural differences in social support seeking: the mediating role of empathic concernPLoS ONE20221612
  • Hashimoto A, Ikels CJohnson MLFilial piety in changing Asian societiesThe Cambridge handbook of age and ageing2005CambridgeCambridge University Press437442
  • Sari DN, Utami W, Zairina EThe influence of feeling lonely and received social support on medication adherence in elderly with hypertensionJ Farm dan Ilmu Kefarmasian Indones202293252261
  • Uchmanowicz B, Chudiak A, Uchmanowicz I, Rosińczuk J, Froelicher ESFactors influencing adherence to treatment in older adults with hypertensionClin Interv Aging20181324252441 30568434 6276633
  • Voils CI, Steffens DC, Bosworth HB, Flint EPSocial support and locus of control as predictors of adherence to antidepressant medication in an elderly populationAm J Geriatr Psychiatry2005132157165 15703325
  • Ayonote UA, Akujuobi OM, Ogbonna ANFamily social support perceptions and medication adherence among elderly diabetics in a tertiary health institution in Lagos, NigeriaCurre Res Diabetes Obes J2022161
  • Page MJ, McKenzie JE, Bossuyt PM, Boutron I, Hoffmann TC, Mulrow CD, The PRISMA, et al.statement: an updated guideline for reporting systematic reviewsBMJ2020202188
  • Tong A, Flemming K, McInnes E, Oliver S, Craig JEnhancing transparency in reporting the synthesis of qualitative research: ENTREQBMC Med Res Methodol2012121181 23185978 3552766
  • Butler A, Hall H, Copnell BA guide to writing a qualitative systematic review protocol to enhance evidence-based practice in nursing and health careWorldviews Evid-Based Nurs2016133241249 26790142
  • Critical Appraisal Skills Programme. CASP appraisal tool for qualitative research [Internet]. 2019 [cited 2021 Dec 20]. Available from: https://casp-uk.net/casp-tools-checklists/.
  • Walsh D, Downe SAppraising the quality of researchMidwifery2006222108119 16243416
  • Thomas J, Harden AMethods for the thematic synthesis of qualitative research in systematic reviewsBMC Med Res Methodol20088145 18616818 2478656
  • Almazan JU, Cruz JP, Alamri MS, Albougami ASB, Alotaibi JSM, Santos AMCoping strategies of older adults survivors following a disaster: disaster-related resilience to climate change adaptationAgeing Int2019442141153
  • Amin IPerceptions of successful aging among older adults in Bangladesh: an exploratory studyJ Cross Cult Gerontol2017322191207 28523474
  • Kwan C, Tam HCAgeing in place in disaster prone rural coastal communities: a case study of Tai O village in Hong KongSustainability20211394618
  • Lao SSW, Le LLP, Wong KKYOlder residents’ perceptions of family involvement in residential careInt J Qual Stud Health Well-being20191411611298 31072244 6522931
  • Liu JE, Tian JY, Yue P, Wang YL, Du XP, Chen SQLiving experience and care needs of Chinese empty-nest elderly people in urban communities in Beijing, China: a qualitative studyInt J Nurs Sci2015211522
  • Maria MAS, Bonanza AAC, Arcega PASQuality of support in the social networks of older Filipino church members: an exploratory studyQual Ageing Older Adults20181914253
  • Nazari S, Foroughan M, Shahboulaghi FM, Rassouli M, Sadeghmoghadam L, Farhadi A, et al.Perceived social support in Iranian older adults: a qualitative studyEduc Gerontol2016426443452
  • Pathike W, O’Brien A, Hunter SMoving on from adversity: an understanding of resilience in rural Thai older peopleAging Ment Heal2019233311318
  • Rittirong J, Prasartkul P, Rindfuss RRFrom whom do older persons prefer support? the case of rural ThailandJ Aging Stud201431171181 25456634
  • Seah B, Espnes GA, Ang ENK, Lim JY, Kowitlawakul Y, Wang WSupporting the mobilization of health assets among older community dwellers residing in senior-only households in Singapore: a qualitative studyBMC Geriatr2020201115
  • Shiraz F, Hildon ZLJ, Vrijhoef HJMExploring the perceptions of the ageing experience in Singaporean older adults: a qualitative studyJ Cross Cult Gerontol2020354389408 1:STN:280:DC%2BB3s%2FptlWitg%3D%3D 33034796 7584554
  • Tabari F, Khaghanizade M, Dehghan-Nayeri N, Najafi-Mehri SMental health and old age: a qualitative study in Iranian populationJ Clin Diagnostic Res2017111158
  • Badriah S, Sahar JFamily support in caring for older people with diabetes mellitus: a phenomenology studyEnferm Clin201828245249
  • Tsuji K, Khan HTAExploring the relationship between social support and life satisfaction among rural elderly in JapanAgeing Int2016414414426
  • Yoo SThe context of perceived and desired social support among Korean older adultsPsychol Heal Med20131814755
  • Carandang RR, Asis E, Shibanuma A, Kiriya J, Murayama H, Jimba MUnmet needs and coping mechanisms among community-dwelling senior citizens in the Philippines: a qualitative studyInt J Environ Res Public Health201916193745 31590288 6801835
  • Cassum LA, Cash K, Qidwai W, Vertejee SExploring the experiences of the older adults who are brought to live in shelter homes in Karachi, Pakistan: a qualitative studyBMC Geriatr2020201112
  • Cheng Y, Xi J, Rosenberg MW, Gao SIntergenerational differences in social support for the community-living elderly in Beijing, ChinaHeal Sci Reports2018111
  • Chuang YH, Abbey JA, Yeh YC, Tseng IJ, Liu MFAs they see it: a qualitative study of how older residents in nursing homes perceive their care needsCollegian20152214351 26285408
  • Han E, Shiraz F, Haldane V, Koh JJK, Quek RYC, Ozdemir S, et al.Biopsychosocial experiences and coping strategies of elderly ESRD patients: a qualitative study to inform the development of more holistic and person-centred health services in SingaporeBMC Public Health20191911107 31412824 6694659
  • Harnirattisai T, Vuthiarpa SThe perception of independent living among Thai older adultsAgeing Int2020452181190
  • Kristianingrum ND, Wiarsih W, Astuti YNPerceived family support among older persons in diabetes mellitus self-managementBMC Geriatr201818Suppl 1304 30563474 6299491
  • Ghani NA, Noordin N, Zulkifli NI, Abdullah B, Ghazalli FSMSocial support for the elderly at Darul Hanan nursing home, Penang, MalaysiaMan India2016961252095228
  • Smith TB, Workman C, Andrews C, Barton B, Cook M, Layton R, et al.Effects of psychosocial support interventions on survival in inpatient and outpatient healthcare settings: a meta-analysis of 106 randomized controlled trialsPLoS Med2021185 34003832 8130925
  • Keshishian F, Colodny N, Boone RTPhysician-patient and pharmacist-patient communication: geriatrics’ perceptions and opinionsPatient Educ Couns2008712265284 18308499
  • Weiss GL, Copelton DAThe sociology of health, healing, and illness2020Routledge
  • Woodham N, Taneepanichskul S, Somrongthong R, Auamkul NMedication adherence and associated factors among elderly hypertension patients with uncontrolled blood pressure in rural area, Northeast ThailandJ Heal Res2018326449458
  • Yeung W-JJ, Cheung AK-LLiving alone: one-person households in AsiaDemogr Res2015S154010991112
  • Kendig HL, Hashimoto A, Coppard LCWorld Health Organization. Family support for the elderly: the international experience1992Oxford University Press
  • Sandelowski M, Barroso JHandbook for synthesizing qualitative research2006Springer Publishing Company