1 Safety Promotion and Injury Prevention Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Islamic Republic of Iran. s.sabour@sbmu.ac.ir.
2 Department of Clinical Epidemiology, School of Health, Shahid Beheshti University of Medical Sciences, Tehran, Islamic Republic of Iran. s.sabour@sbmu.ac.ir.
3 Department of Clinical Epidemiology, School of Health, Shahid Beheshti University of Medical Sciences, Tehran, Islamic Republic of Iran.