1. Medical Education Research Center, Health Management and Safety Promotion Research Institute, Tabriz University of Medical Sciences, Tabriz, Iran
2. Nutrition Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
3. Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
4. Traffic and Accident Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
5. Department of Statistics and Epidemiology, Faculty of Health, Tabriz University of Medical Sciences, Tabriz, Iran