Author/Authors :
Almasi-Hashiani, Amir Department of Epidemiology - School of Health - Arak University of Medical Sciences - Arak - Iran , Doosti-Irani, Amin Department of Epidemiology - School of Public Health and Research Center for Health Sciences - Hamadan University of Medical Sciences - Hamadan - Iran , Mansournia, Mohammad Ali Department of Epidemiology and Biostatistics - School of Public Health - Tehran University of Medical Sciences - Tehran - Iran
