Institution: | 1. Department of Oral and Maxillofacial Surgery, School of Dentistry, Hamadan University of Medical Sciences, , Hamadan, Iran;2. Department of Biostatistics and Epidemiology, School of Public Health, Hamadan Medical Sciences University, , Hamadan, Iran;3. Department of Biochemistry and Biotechnology, Hamadan Medical Sciences University, , Hamadan, Iran;4. General Dental Practitioner, , Hamadan, Iran |