Evaluation of Sleep Habits, Generalized Anxiety, Perceived Stress, and Research Outputs Among Postgraduate Research Students in Hong Kong During the Coronavirus (COVID-19) Pandemic

References

• Jebril N. World Health Organization declared a pandemic public health menace: a systematic review of the coronavirus disease 2019 “COVID-19”, up to 26th March 2020. Available at SSRN 3566298. 2020.
   Google Scholar
• WHO. Coronavirus disease (COVID-19) outbreak situation. Available from: https://covid19.who.int/. Accessed October 30, 2021.
   Google Scholar
• Wilder-Smith A, Freedman DO. Isolation, quarantine, social distancing and community containment: pivotal role for old-style public health measures in the novel coronavirus (2019-nCoV) outbreak. J Travel Med. 2020;27(2):1–4. doi:10.1093/jtm/taaa020
   Web of Science ®Google Scholar
• Wilder-Smith A, Chiew CJ, Lee VJ. Can we contain the COVID-19 outbreak with the same measures as for SARS? Lancet Infect Dis. 2020;20(5):e102–e7. doi:10.1016/S1473-3099(20)30129-8
   PubMed Web of Science ®Google Scholar
• Cowling BJ, Ali ST, Ng TW, et al. Impact assessment of non-pharmaceutical interventions against coronavirus disease 2019 and influenza in Hong Kong: an observational study. Lancet Public Health. 2020;5(5):e279–e88. doi:10.1016/S2468-2667(20)30090-6
   PubMed Web of Science ®Google Scholar
• Aydemir D, Ulusu NN. Identifying and solving scientific problems in the medicine: key to become a competent scientist. Turk J Biochem. 2020;45(2). doi:10.1515/tjb-2018-0357
   Web of Science ®Google Scholar
• Aydemir D, Ulusu NN. Commentary: challenges for PhD students during COVID‐19 pandemic: turning crisis into an opportunity. Biochem Mol Biol Educ. 2020;48(5):428–429. doi:10.1002/bmb.21351
   Web of Science ®Google Scholar
• Marinoni G, Van’t Land H, Jensen T. The impact of Covid-19 on higher education around the world. IAU global survey report; 2020. Available from: https://www.iau-aiu.net/IMG/pdf/iau_covid19_and_he_survey_report_final_may_2020.pdf. Accessed October 30, 2021.
   Google Scholar
• Offerdahl EG, Momsen JL, Osgood M. Commentary: PhDs in biochemistry education—5 years later. Biochem Mol Biol Educ. 2014;42(2):103–105. doi:10.1002/bmb.20768
   Web of Science ®Google Scholar
• Ratcliff R, Van Dongen HP. Sleep deprivation affects multiple distinct cognitive processes. Psychon Bull Rev. 2009;16(4):742–751. doi:10.3758/PBR.16.4.742
   PubMed Web of Science ®Google Scholar
• Giri P, Baviskar M, Phalke D. Study of sleep habits and sleep problems among medical students of Pravara Institute of Medical Sciences Loni, Western Maharashtra, India. Ann Med Health Sci Res. 2013;3(1):51–54. doi:10.4103/2141-9248.109488
   Google Scholar
• Ahrberg K, Dresler M, Niedermaier S, Steiger A, Genzel L. The interaction between sleep quality and academic performance. J Psychiatr Res. 2012;46(12):1618–1622. doi:10.1016/j.jpsychires.2012.09.008
   PubMed Web of Science ®Google Scholar
• Ibarra-Coronado EG, Pantaleón-Martínez AM, Velazquéz-Moctezuma J, et al. The bidirectional relationship between sleep and immunity against infections. J Immunol Res. 2015;2015:678164.
   PubMed Web of Science ®Google Scholar
• Peach H, Gaultney JF, Gray DD. Sleep hygiene and sleep quality as predictors of positive and negative dimensions of mental health in college students. Cogent Psychol. 2016;3(1):1168768. doi:10.1080/23311908.2016.1168768
   Web of Science ®Google Scholar
• McCrae CS, Dzierzewski JM, Kay DB. Treatment of late-life insomnia. Sleep Med Clin. 2009;4(4):593–604. doi:10.1016/j.jsmc.2009.07.006
   Google Scholar
• Perlis ML, Jungquist C, Smith MT, Posner D. Cognitive Behavioral Treatment of Insomnia: A Session-By-Session Guide. Springer Science & Business Media; 2006.
   Google Scholar
• Bathija GV, Sushma H. A cross sectional study to assess the sleep hygiene among the post graduates of KIMS, Hubballi. Int J Commun Med Public Health. 2019;6(4):1645. doi:10.18203/2394-6040.ijcmph20191399
   Google Scholar
• Brick CA, Seely DL, Palermo TM. Association between sleep hygiene and sleep quality in medical students. Behav Sleep Med. 2010;8(2):113–121. doi:10.1080/15402001003622925
   PubMed Web of Science ®Google Scholar
• Al-Kandari S, Alsalem A, Al-Mutairi S, Al-Lumai D, Dawoud A, Moussa M. Association between sleep hygiene awareness and practice with sleep quality among Kuwait University students. Sleep Health. 2017;3(5):342–347. doi:10.1016/j.sleh.2017.06.004
   Web of Science ®Google Scholar
• Suen L, Tam W, Hon K. Association of sleep hygiene-related factors and sleep quality among university students in Hong Kong. Hong Kong Med J. 2010;16(3):180–185.
   PubMedGoogle Scholar
• Vanderlind WM, Beevers CG, Sherman SM, et al. Sleep and sadness: exploring the relation among sleep, cognitive control, and depressive symptoms in young adults. Sleep Med. 2014;15(1):144–149. doi:10.1016/j.sleep.2013.10.006
   Web of Science ®Google Scholar
• Short MA, Gradisar M, Lack LC, Wright HR. The impact of sleep on adolescent depressed mood, alertness and academic performance. J Adolesc. 2013;36(6):1025–1033. doi:10.1016/j.adolescence.2013.08.007
   PubMed Web of Science ®Google Scholar
• Menon B, Karishma HP, Mamatha IV. Sleep quality and health complaints among nursing students. Ann Indian Acad Neurol. 2015;18(3):363. doi:10.4103/0972-2327.157252
   PubMed Web of Science ®Google Scholar
• Forbes EE, Bertocci MA, Gregory AM, et al. Objective sleep in pediatric anxiety disorders and major depressive disorder. J Am Acad Child Adolesc Psychiatry. 2008;47(2):148–155. doi:10.1097/chi.0b013e31815cd9bc
   PubMed Web of Science ®Google Scholar
• Storch EA, Murphy TK, Lack CW, Geffken GR, Jacob ML, Goodman WK. Sleep-related problems in pediatric obsessive-compulsive disorder. J Anxiety Disord. 2008;22(5):877–885. doi:10.1016/j.janxdis.2007.09.003
   PubMed Web of Science ®Google Scholar
• Callender J, Fagin J, Jenkins G, Lester J, Smith E. Mental Health of Students in Higher Education. London: Royal College of Psychiatrists; 2011.
   Google Scholar
• Jansson M, Linton SJ. The development of insomnia within the first year: a focus on worry. Br J Health Psychol. 2006;11(3):501–511. doi:10.1348/135910705X57412
   PubMed Web of Science ®Google Scholar
• Morphy H, Dunn KM, Lewis M, Boardman HF, Croft PR. Epidemiology of insomnia: a longitudinal study in a UK population. Sleep. 2007;30(3):274–280.
   PubMed Web of Science ®Google Scholar
• Jansson-Fröjmark M, Lindblom K. A bidirectional relationship between anxiety and depression, and insomnia? A prospective study in the general population. J Psychosom Res. 2008;64(4):443–449. doi:10.1016/j.jpsychores.2007.10.016
   PubMed Web of Science ®Google Scholar
• Johnson EO, Roth T, Breslau N. The association of insomnia with anxiety disorders and depression: exploration of the direction of risk. J Psychiatr Res. 2006;40(8):700–708. doi:10.1016/j.jpsychires.2006.07.008
   PubMed Web of Science ®Google Scholar
• Monti JM, Monti D. Sleep in schizophrenia patients and the effects of antipsychotic drugs. Sleep Med Rev. 2004;8(2):133–148. doi:10.1016/S1087-0792(02)00158-2
   PubMed Web of Science ®Google Scholar
• Murphy RJ, Gray SA, Sterling G, Reeves K, DuCette J. A comparative study of professional student stress. J Dent Educ. 2009;73(3):328–337. doi:10.1002/j.0022-0337.2009.73.3.tb04705.x
   PubMed Web of Science ®Google Scholar
• D’silva P, Palatty PL, D’souza O, Chandran SK, Baliga MS. Psychological stress in Northeast Indian students pursuing their higher studies in Mangalore. Indian J Soc Psychiatry. 2020;36(3):214. doi:10.4103/ijsp.ijsp_96_19
   Google Scholar
• Lee Smith LJ, Trott M, Yakkundi A, et al. The association between screen time and mental health during COVID-19: a cross sectional study. Psychiatry Res. 2020;292:113333. doi:10.1016/j.psychres.2020.113333
   Web of Science ®Google Scholar
• Mastin DF, Bryson J, Corwyn R. Assessment of sleep hygiene using the Sleep Hygiene Index. J Behav Med. 2006;29(3):223–227. doi:10.1007/s10865-006-9047-6
   PubMed Web of Science ®Google Scholar
• Spitzer RL, Kroenke K, Williams JB, Löwe B. A brief measure for assessing generalized anxiety disorder: the GAD-7. Arch Intern Med. 2006;166(10):1092–1097. doi:10.1001/archinte.166.10.1092
   PubMed Web of Science ®Google Scholar
• Cohen S, Kamarck T, Mermelstein R, Global A. Measure of perceived stress. J Health Soc Behav. 1983;24(4):385–396. doi:10.2307/2136404
   PubMed Web of Science ®Google Scholar
• Chan LL, Wong AY, Wang MH. Associations between sport participation and knee symptoms: a cross-sectional study involving 3053 undergraduate students. BMC Sports Sci Med Rehabil. 2020;12(1):1–8. doi:10.1186/s13102-020-00169-w
   Web of Science ®Google Scholar
• Chan LL, Wong AY, Wang MH, Cheung K, Samartzis D. The prevalence of neck pain and associated risk factors among undergraduate students: a large-scale cross-sectional study. Int J Ind Ergon. 2020;76:102934. doi:10.1016/j.ergon.2020.102934
   Web of Science ®Google Scholar
• Weess HG. Diagnostics of sleep disorders. Verhaltenstherapie. 2005;15(4):220–233. doi:10.1159/000089490
   Web of Science ®Google Scholar
• Anwer S, Alghadir A, Manzar MD, Noohu MM, Salahuddin M, Li H. Psychometric analysis of the sleep hygiene index and correlation with stress and anxiety among Saudi University students. Nat Sci Sleep. 2019;11:325–332. doi:10.2147/NSS.S222440
   PubMed Web of Science ®Google Scholar
• Doi S, Ito M, Takebayashi Y, Muramatsu K, Horikoshi M. Factorial validity and invariance of the 7-item generalized anxiety disorder scale (GAD-7) among populations with and without self-reported psychiatric diagnostic status. Front Psychol. 2018;9:1741. doi:10.3389/fpsyg.2018.01741
   PubMed Web of Science ®Google Scholar
• Alghadir A, Manzar MD, Anwer S, Albougami A, Salahuddin M. Psychometric properties of the generalized anxiety disorder scale among Saudi University male students. Neuropsychiatr Dis Treat. 2020;16:1427–1432. doi:10.2147/NDT.S246526
   PubMed Web of Science ®Google Scholar
• Manzar MD, Salahuddin M, Peter S, et al. Psychometric properties of the perceived stress scale in Ethiopian university students. BMC Public Health. 2019;19(1):1–8. doi:10.1186/s12889-018-6310-z
   PubMed Web of Science ®Google Scholar
• Lee EH. Review of the psychometric evidence of the perceived stress scale. Asian Nurs Res. 2012;6(4):121–127. doi:10.1016/j.anr.2012.08.004
   PubMed Web of Science ®Google Scholar
• Alyoubi A, Halstead EJ, Zambelli Z, Dimitriou D. The impact of the COVID-19 pandemic on students’ mental health and sleep in Saudi Arabia. Int J Environ Res Public Health. 2021;18(17):9344. doi:10.3390/ijerph18179344
   PubMed Web of Science ®Google Scholar
• Soper DS. A-priori sample size calculator for multiple regression [Software]; 2021. Available from: https://www.danielsoper.com/statcalc. Accessed October 30, 2021.
   Google Scholar
• Ferini-Strambi L, Zucconi M, Casoni F, Salsone M. COVID-19 and sleep in medical staff: reflections, clinical evidences, and perspectives. Curr Treat Option N. 2020;22(10):1–6.
   PubMed Web of Science ®Google Scholar
• Huang YE, Zhao N. Generalized anxiety disorder, depressive symptoms and sleep quality during COVID-19 outbreak in China: a web-based cross-sectional survey. Psychiatry Res. 2020;288:112954. doi:10.1016/j.psychres.2020.112954
   PubMed Web of Science ®Google Scholar
• Altena E, Baglioni C, Espie CA, et al. Dealing with sleep problems during home confinement due to the COVID-19 outbreak: practical recommendations from a task force of the European CBT-I academy. J Sleep Res. 2020;29(4):e13052. doi:10.1111/jsr.13052
   PubMed Web of Science ®Google Scholar
• Duffy B. Life Under Lockdown: Coronavirus in the UK. Kings College London: The Policy Institute; 2020.
   Google Scholar
• Innocenti P, Puzella A, Mogavero MP, Bruni O, Ferri R. Letter to editor: CoVID-19 pandemic and sleep disorders-a web survey in Italy. Neurolog Sci. 2020;41(8):2021–2022. doi:10.1007/s10072-020-04523-1
   Web of Science ®Google Scholar
• Reid A, Baker FC. Perceived sleep quality and sleepiness in South African university students. S Afr J Psychol. 2008;38(2):287–303. doi:10.1177/008124630803800203
   Web of Science ®Google Scholar
• Smolicz JJ, Secombe MJ, Hudson DM. Family collectivism and minority languages as core values of culture among ethnic groups in Australia. J Multiling Multicultural Dev. 2001;22(2):152–172. doi:10.1080/01434630108666430
   Google Scholar
• Li QM, Miao YD, Zeng X, Tarimo CS, Wu CP, Wu J. Prevalence and factors for anxiety during the coronavirus disease 2019 (COVID-19) epidemic among the teachers in China. J Affect Disorders. 2020;277:153–158. doi:10.1016/j.jad.2020.08.017
   PubMed Web of Science ®Google Scholar
• Qiu JY, Shen B, Zhao M, Wang Z, Xie B, Xu YF. A nationwide survey of psychological distress among Chinese people in the COVID-19 epidemic: implications and policy recommendations. Gen Psychiat. 2020;33(2):e100213. doi:10.1136/gpsych-2020-100213
   PubMed Web of Science ®Google Scholar
• Bauerle A, Teufel M, Musche V, et al. Increased generalized anxiety, depression and distress during the COVID-19 pandemic: a cross-sectional study in Germany. J Public Health (Bangkok). 2020;42(4):672–678. doi:10.1093/pubmed/fdaa106
   PubMed Web of Science ®Google Scholar
• Liu S, Yang LL, Zhang CX, et al. Online mental health services in China during the COVID-19 outbreak. Lancet Psychiat. 2020;7(4):E17–E18. doi:10.1016/S2215-0366(20)30077-8
   PubMed Web of Science ®Google Scholar
• Wang CY, Pan RY, Wan XY, et al. Immediate psychological responses and associated factors during the initial stage of the 2019 Coronavirus disease (COVID-19) epidemic among the general population in China. Int J Environ Res Public Health. 2020;17(5):1729. doi:10.3390/ijerph17051729
   PubMed Web of Science ®Google Scholar
• Cao WJ, Fang ZW, Hou GQ, et al. The psychological impact of the COVID-19 epidemic on college students in China. Psychiatry Res. 2020;287:112934. doi:10.1016/j.psychres.2020.112934
   PubMed Web of Science ®Google Scholar
• Moccia L, Janiri D, Pepe M, et al. Affective temperament, attachment style, and the psychological impact of the COVID-19 outbreak: an early report on the Italian general population. Brain Behav Immun. 2020;87:75–79. doi:10.1016/j.bbi.2020.04.048
   PubMed Web of Science ®Google Scholar
• Wang XM, Hegde S, Son C, Keller B, Smith A, Sasangohar F. Investigating mental health of US college students during the COVID-19 pandemic: cross-sectional survey study. J Med Internet Res. 2020;22(9):e22817. doi:10.2196/22817
   PubMed Web of Science ®Google Scholar
• Khan AH, Sultana MS, Hossain S, Hasan MT, Ahmed HU, Sikder MT. The impact of COVID-19 pandemic on mental health & wellbeing among home-quarantined Bangladeshi students: a cross-sectional pilot study. J Affect Disorders. 2020;277:121–128. doi:10.1016/j.jad.2020.07.135
   PubMed Web of Science ®Google Scholar
• Wang CY, Zhao H. The impact of COVID-19 on anxiety in Chinese University students. Front Psychol. 2020;11:1168. doi:10.3389/fpsyg.2020.01168
   PubMed Web of Science ®Google Scholar
• Asmundson GJG, Taylor S. How health anxiety influences responses to viral outbreaks like COVID-19: what all decision-makers, health authorities, and health care professionals need to know. J Anxiety Disord. 2020;71:102211. doi:10.1016/j.janxdis.2020.102211
   PubMed Web of Science ®Google Scholar
• Pedrosa AL, Bitencourt L, Froes ACF, et al. Emotional, behavioral, and psychological impact of the COVID-19 pandemic. Front Psychol. 2020;11:566212. doi:10.3389/fpsyg.2020.566212
   PubMed Web of Science ®Google Scholar
• Asmundson GJG, Taylor S. Coronaphobia: fear and the 2019-nCoV outbreak. J Anxiety Disord. 2020;70:102196. doi:10.1016/j.janxdis.2020.102196
   PubMed Web of Science ®Google Scholar
• Roy D, Tripathy S, Kar SK, Sharma N, Verma SK, Kaushal V. Study of knowledge, attitude, anxiety & perceived mental healthcare need in Indian population during COVID-19 pandemic. Asian J Psychiatr. 2020;51:102083. doi:10.1016/j.ajp.2020.102083
   PubMed Web of Science ®Google Scholar
• Moghanibashi-Mansourieh A. Assessing the anxiety level of Iranian general population during COVID-19 outbreak. Asian J Psychiatr. 2020;51:102076. doi:10.1016/j.ajp.2020.102076
   PubMed Web of Science ®Google Scholar
• Wang Y, Di Y, Ye J, Wei W. Study on the public psychological states and its related factors during the outbreak of coronavirus disease 2019 (COVID-19) in some regions of China. Psychol Health Med. 2021;26(1):13–22. doi:10.1080/13548506.2020.1746817
   PubMed Web of Science ®Google Scholar
• Zhang Y, Ma ZF. Impact of the COVID-19 pandemic on mental health and quality of life among local residents in Liaoning Province, China: a cross-sectional study. Int J Environ Res Public Health. 2020;17(7):2381. doi:10.3390/ijerph17072381
   PubMed Web of Science ®Google Scholar
• Banerjee D. The COVID-19 outbreak: crucial role the psychiatrists can play. Asian J Psychiatr. 2020;50:102014. doi:10.1016/j.ajp.2020.102014
   PubMed Web of Science ®Google Scholar
• World Health Organization. Mental Health and Psychosocial Considerations During the COVID-19 Outbreak, 18 March 2020. Geneva: World Health Organization;2020. Contract No.: WHO/2019-nCoV/MentalHealth/2020.1.
   Google Scholar
• Puccinelli PJ, da Costa TS, Seffrin A, et al. Reduced level of physical activity during COVID-19 pandemic is associated with depression and anxiety levels: an internet-based survey. BMC Public Health. 2021;21(1):1.
   PubMed Web of Science ®Google Scholar
• Woods JA, Hutchinson NT, Powers SK, et al. The COVID-19 pandemic and physical activity. Sports Med Health Sci. 2020;2(2):55–64. doi:10.1016/j.smhs.2020.05.006
   PubMedGoogle Scholar
• Newby JM, O’Moore K, Tang S, Christensen H, Faasse K. Acute mental health responses during the COVID-19 pandemic in Australia. PLoS One. 2020;15(7):e0236562. doi:10.1371/journal.pone.0236562
   PubMed Web of Science ®Google Scholar
• Holmes EA, O’Connor RC, Perry VH, et al. Multidisciplinary research priorities for the COVID-19 pandemic: a call for action for mental health science. Lancet Psychiat. 2020;7(6):547–560. doi:10.1016/S2215-0366(20)30168-1
   PubMed Web of Science ®Google Scholar
• Manzar MD, Alghadir AH, Khan M, et al. Anxiety symptoms are associated with higher psychological stress, poor sleep, and inadequate sleep hygiene in collegiate young adults—a cross-sectional study. Front Psychiatr. 2021;12. doi:10.3389/fpsyt.2021.677136
   Web of Science ®Google Scholar
• Shamsuddin K, Fadzil F, Ismail WSW, et al. Correlates of depression, anxiety and stress among Malaysian university students. Asian J Psychiatr. 2013;6(4):318–323. doi:10.1016/j.ajp.2013.01.014
   PubMedGoogle Scholar
• Islam MA, Barna SD, Raihan H, Khan MNA, Hossain MT. Depression and anxiety among university students during the COVID-19 pandemic in Bangladesh: a web-based cross-sectional survey. PLoS One. 2020;15(8):e0238162. doi:10.1371/journal.pone.0238162
   PubMed Web of Science ®Google Scholar
• Alim SA, Rabbani MG, Karim E, Mullick MSI, Al Mamun A, Khan MZR. Assessment of depression, anxiety and stress among first year MBBS students of a public medical college, Bangladesh. Bangla J Psychiatr. 2015;29(1):23–29. doi:10.3329/bjpsy.v29i1.32748
   Google Scholar
• Tayefi B, Eftekhar M, Tayefi M, et al. Prevalence and socio-demographic correlates of mental health problems among Iranian health sciences students. Acad Psychiatr. 2020;44(1):73–77. doi:10.1007/s40596-019-01121-y
   Web of Science ®Google Scholar
• Lejtzen N, Sundquist J, Sundquist K, Li XJ. Depression and anxiety in Swedish primary health care: prevalence, incidence, and risk factors. Eur Arch Psy Clin N. 2014;264(3):235–245.
   PubMed Web of Science ®Google Scholar
• Wolf MR, Rosenstock JB. Inadequate sleep and exercise associated with burnout and depression among medical students. Acad Psychiatr. 2017;41(2):174–179. doi:10.1007/s40596-016-0526-y
   PubMed Web of Science ®Google Scholar
• Son C, Hegde S, Smith A, Wang XM, Sasangohao F. Effects of COVID-19 on college students’ mental health in the United States: interview survey study. J Med Internet Res. 2020;22(9):e21279. doi:10.2196/21279
   PubMed Web of Science ®Google Scholar
• Martin JM. Stigma and student mental health in higher education. High Educ Res Dev. 2010;29(3):259–274. doi:10.1080/07294360903470969
   Web of Science ®Google Scholar
• Kecojevic A, Basch CH, Sullivan M, Davi NK. The impact of the COVID-19 epidemic on mental health of undergraduate students in New Jersey, cross-sectional study. PLoS One. 2020;15(9):e0239696. doi:10.1371/journal.pone.0239696
   PubMed Web of Science ®Google Scholar
• Olaimat AN, Aolymat I, Elsahoryi N, Shahbaz HM, Holley RA. Attitudes, anxiety, and behavioral practices regarding COVID-19 among university students in Jordan: a cross-sectional study. Am J Trop Med Hyg. 2020;103(3):1177–1183. doi:10.4269/ajtmh.20-0418
   PubMed Web of Science ®Google Scholar
• Harper L, Kalfa N, Beckers G, et al. The impact of COVID-19 on research. J Pediatr Urol. 2020;16(5):715. doi:10.1016/j.jpurol.2020.07.002
   PubMed Web of Science ®Google Scholar
• Byrd KL, Gelaye B, Tadesse MG, Williams MA, Lemma S, Berhane Y. Sleep disturbances and common mental disorders in college students. Health Behav Policy Rev. 2014;1(3):229–237. doi:10.14485/HBPR.1.3.7
   PubMedGoogle Scholar
• Nyer M, Farabaugh A, Fehling K, et al. Relationship between sleep disturbance and depression, anxiety, and functioning in college students. Depress Anxiety. 2013;30(9):873–880. doi:10.1002/da.22064
   PubMed Web of Science ®Google Scholar
• Zhang Y, Peters A, Chen G. Perceived stress mediates the associations between sleep quality and symptoms of anxiety and depression among college nursing students. Int J Nurs Educ Scholarsh. 2018;15(1):1–9. doi:10.1515/ijnes-2017-0020
   Google Scholar