1. Assistant Professor of Community and Preventive Medicine, Department of Community Medicine, School of Medicine, Arak University of Medical Sciences, Arak, Iran
2. Student of General Medicine, Students Research Committee, Arak University of Medical Sciences, Arak, Iran
3. Professor of Infectious Diseases, Department of Infectious Diseases, Infectious Diseases Research Center, School of Medicine, Arak University of Medical Sciences, Arak, Iran
4. PhD Student of Biostatistics, Department of Biostatistics and Epidemiology, School of Health, Scientific Research Center, Tehran University of Medical Sciences, Tehran, Iran