1. Iran University of Medical Sciences, Faculty of Public Health, Department of Epidemiology, Tehran, Iran

2. Student Research Committee, Iran University of Medical Sciences, Tehran, Iran

3. Health Deputy, North Khorasan University of Medical Sciences, Bojnurd, Iran

4. Health Deputy, Babol University of Medical Sciences, Babol, Iran

5. Tehran University of Medical Sciences, Faculty of Public Health, Department of Epidemiology and Biostatistics, Tehran, Iranw