1. Dental Research Center, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
2. Oral & Maxillofacial Diseases Research Center, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
3. Department of Operative Dentistry, School of Dentistry, Islamic Azad University, Isfahan (Khorasgan/Branch), Isfahan, Iran
4. Private Practice, Mashhad, Iran