1. Associate Professor, Department of Endodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
2. Laser Application in Medical Sciences Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
3. Private office, Tehran, Iran
4. Students’ Research Committee, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran