1. Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
2. Department of Health, Safety, and Environment, School of Health, Tabriz University of Medical Sciences, Tabriz, Iran
3. Safety and Accident Investigation Centre, Cranfield University, Cranfield, United Kingdom
4. Department of Statistics and Epidemiology, School of Health, Tabriz University of Medical Sciences, Tabriz, Iran
5. Department of Occupational Health Engineering, School of Health, Tabriz University of Medical Sciences, Tabriz, Iran