| Affiliation: | 1. Laser Research Center in Dentistry, Tehran University of Medical Science, , Tehran, Iran;2. Laser Research Center in Dentistry, Advanced Periodontics, School of Dentistry, Tehran University of Medical Science, , Tehran, Iran;3. Student's Scientific Research Center, Tehran University of Medical Sciences, , Tehran, Iran;4. Laser Research Center in Dentistry, School of Dentistry, Tehran University of Medical Science, , Tehran, Iran;5. Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, , Tehran, Iran;6. Professor of Clinical Dentistry and Director of Advanced Periodontics, Herman Ostrow School of Dentistry, University of Southern California, , Los Angeles, CA, USA |
