Farid Najafi1,2, Fatemeh Khosravi Shadmani1, Mojtaba Ghalandari3,4, Mitra Darbandi5. 1. Research Center for Environmental Determinants of Health (RCEDH), Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran. 2. Cardiovascular Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran. 3. Mahneshan Health Center, Zanjan University of Medical Sciences, Zanjan, Iran. 4. Department Epidemiology, Public Health College, Kermanshah University of Medical Sciences, Kermanshah, Iran. 5. Research Center for Environmental Determinants of Health (RCEDH), Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran. m.darbandi@kums.ac.ir.