1. Candidate in Epidemiology, Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
2. Professore of Biostatistics, Department of Epidemiology and Biostatistics, School of Public Health, Tehran, Iran
3. Associate Professor of Biostatistics, Health Management and Social Development Research Center, Department of Biostatistics and Epidemiology, Faculty of Health, Golestan University of Medical Sciences, Gorgan, Iran
4. Professore of Epidemiology, Department of Epidemiology and Biostatistics, School of Public Health, Tehran, Iran