1. Oral and Maxillofacial Medicine Department, School of Dentistry Shiraz University of Medical Sciences Shiraz Iran
2. Department of Periodontology, Faculty of Dentistry Tabriz University of Medical Sciences Tabriz Iran
3. School of Dentistry Tabriz University of Medical Sciences Tabriz Iran
4. School of Dentistry Shiraz University of Medical Sciences Shiraz Iran
5. Oral and Maxillofacial Medicine Department, School of Dentistry Tabriz University of Medical Sciences Tabriz Iran