1. Sleep Disorders Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
2. Research Center for Environmental Determinants of Health, School of Public Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
3. Social Development and Health Promotion Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
4. Department of Psychology, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
5. Iranian National Center for Addiction Studies (INCAS), Tehran University of Medical Sciences, Tehran, Iran
6. Department of Epidemiology, Kermanshah University of Medical Sciences, Kermanshah, Iran Received: September