...Ali Chalak Lilian Ghandour Sirine Anouti Rima Nakkash Nasser Yassin Rima Afifi Corresponding author. Department of Epidemiology and Population Health, Faculty of Health Sciences, American University of Beirut, Beirut 1107 2020, Lebanon. E mail: lg01 aub.edu.lb 21 02 2020 The Author s...