Document Type : Original Article
Authors
1 Department of Community Medicine and Public Health, Faculty of Medicine, Mashhad University of Medical Sciences Mashhad Iran
2 Oral Health and community dentistry,, faculty of dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
3 Medical Student, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
4 Department of Microbiology and Virology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
5 Department of Community Medicine, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
Keywords
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