1. Department of Epidemiology, School of Public Health and Safety, Shahid Beheshti University of Medical Science, Tehran, Iran
2. Department of Public Health, School of Public Health, Mashhad University of Medical Sciences, Mashhad, Iran
3. Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
4. Sina Trauma and Surgery Research Centre, Tehran University of Medical Sciences, Tehran, Iran
5. Department of Epidemiology and Biostatistics, School of Public Health, Knowledge Utilization Research Center, Tehran University of Medical Sciences, Tehran, Iran