1. Department of Emergency Medicine, Imam Hossein Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
2. Department of Epidemiology, Masih Daneshvari Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
3. Social Development and Health Promotion Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
4. Clinical Research Development Unit, Imam Hossein Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran