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1The Modern Social Association, Aden, Yemen
2Heidelberg Institute of Global Health, Heidelberg University School of Medicine, Heidelberg, Germany
3Institute of Medical Biometry and Informatics, Heidelberg University School of Medicine, Heidelberg, Germany
4Health and Education Association for Development (SAWT), Aden, Yemen
5Community Medicine Department, Faculty of Medicine, University of Aden, Aden, Yemen
6Institute of Public Health, Jagiellonian University Medical College, Krakow, Poland
©2019, Korean Society of Epidemiology
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