| Affiliation: | 1. Department of Oral Biology, University of North Carolina at Chapel Hill School of Dentistry, Chapel Hill, NC, USA;2. Private Practice, Coconut Grove, FL, USA;3. Department of Preventive and Restorative Sciences, University of Pennsylvania School of Dental Medicine, Philadelphia, PA, USA;4. Private Practice, North Massapequa, NY, USA;5. Department of Periodontics, School of Dentistry, Mashhad Dental Research Center, Mashhad, Iran;6. Department of Periodontics, University of Pennsylvania School of Dental Medicine, Philadelphia, PA, USA |
