1. Department of Environmental Health Engineering, School of Health, Social Development & Health Promotion Research Center, Gonabad University of Medical Sciences, Gonabad, Iran
2. Department of Microbiology, School of Medicine, Gonabad University of Medical Sciences, Gonabad, Iran
3. Department of Environmental Health Engineering, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran
4. Social Determinants of Health Research Center, Mashhad University of Medical Sciences, Mashhad, Iran