[1
]Department of Epidemiology and Population Health, American University of Beirut, Beirut,
Lebanon.
[2
]Center for Research on Population and Health, American University of Beirut, Beirut,
Lebanon.
[3
]Department of Health Behavior and Education, American University of Beirut, Beirut,
Lebanon.
[4
]Department of Health, UNRWA Headquarter, Amman, Jordan.