American University of Beirut, American University of Beirut - Center for Systematic Reviews on Health Policy and Systems Research (SPARK), American University of Beirut - Department of Health Management and Policy, American University of Beirut - Faculty of Health Sciences, American University of Beirut, American University of Beirut - Faculty of Health Sciences, American University of Beirut - Faculty of Health Sciences, American University of Beirut - Faculty of Medicine, Liverpool School of Tropical Medicine, American University of Beirut - Center for Systematic Reviews on Health Policy and Systems Research (SPARK) and American University of Beirut - Department of Internal Medicine