1
Assistant Professor, Dept of Oral Medicine, School of Dentistry and Dental Research Center of Mashhad University of Medical Sciences, Mashhad, Iran
2
Assistant Professor, Dept of Oral & Maxillofacial Pathology, School of Dentistry and Dental Research Center of Mashhad University of Medical Sciences, Mashhad, Iran
3
Post-Graduate Student, Dept of Oral medicine, Dental School, Mashhad University of Medical Sciences, Mashhad, Iran
