1 Department of Oral and Maxillofacial Pathology, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
2 Department of Oral and Maxillofacial Surgery, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
3 Department of Periodontology, School of Dentistry, Shahid Beheshti University of Medical Sciences, 1st floor, Daneshjoo Blvd, Evin, Chamran HWY, Tehran, Iran. Electronic address: dr.f.attarbashi@gmail.com.