Yousef Veisani1, Salman Khazaei2. 1. Psychosocial Injuries Research Center, Ilam University of Medical Sciences, Ilam, Iran. Electronic address: yousefveisani@yahoo.com. 2. Department of Epidemiology, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran. Electronic address: salman.khazaei61@gmail.com.