Iranian Journal of Health, Safety and Environment e-ISSN: :2345-5535 Iran university of Medical sciences, Tehran, Iran
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		Hossein Masoumbeigi
								
1)	Department of environmental health, Health Faculty, Baqiyatallah University of Medical Sciences, Tehran, Iran.			
		Ghader Ghanizadeh
								
1)	Department of environmental health, Health Faculty, Baqiyatallah University of Medical Sciences, Tehran, Iran.			
		Bahman Ramacandi
								
2)	Department of Environmental Health Engineering, Faculty of Health, Bushehr University of Medical Sciences, Bushehr, Iran.			
		Hossein Kardan Yamchi
								
Department of environmental health, Health Faculty, Baqiyatallah University of Medical Sciences, Tehran,  Iran.