Document Type : Original Article
Authors
1 Assistant Professor, Department of Community Medicine, Addiction Research Center, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
2 General Practitioner, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
3 Medical Student, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
Abstract
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