1. Department of Endodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
2. Endodontist, Private Practice, Tehran, Iran
3. Department of Pathology, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
4. Department of Operative Dentistry, Dental Caries Prevention Research Center, Qazvin University of Medical Sciences, Qazvin, Iran
5. Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Shahed University, Tehran, Iran
6. Dental Research Center, Restorative Department, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
7. Stem Cell Preparation Unit, Farabi Eye Hospital, Teheran University of Medical Sciences, Teheran, Iran