1. Infectious Diseases and Tropical Medicine Research Center, Research Institute of Cellular and Molecular Sciences in Infectious Diseases, Zahedan University of Medical Sciences, Zahedan, Iran
2. Health Promotion Research Center, Zahedan University of Medical Sciences, Zahedan, Iran
3. Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
4. Department of Epidemiology, Zahedan University of Medical Sciences, Zahedan, Iran