1. Department of Occupational Health Engineering, School of Public Health, Tabriz University of Medical Sciences, P.O. Box 5166614711, Tabriz, Iran
2. Department of Color and Surface Coatings, Faculty of Polymer Processing, Iran Polymer and Petrochemical Institute, P.O. Box 14975-112, Tehran, Iran
3. Department of Biostatistics and Epidemiology, Faculty of Health, Tabriz University of Medical Sciences, P.O. Box 5166614711, Tabriz, Iran