1. Department of Endodontics, School of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
2. Private Practice, Yazd, Iran
3. Department of Bio-Statistics and Epidemiology, Shahid Sadoughi University of Medical Science, Yazd, Iran
4. Department of Oral and Maxillofacial Medicine, School of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran