Affiliation: | 1. Department of Periodontics and Oral Biology, College of Dental Medicine, Georgia Regents University, Augusta, GA, USA;2. Periodontology, Faculty of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, Brazil;3. Periodontal Diagnostics Research Laboratory, Department of Periodontology and Oral Implantology, Temple University, School of Dentistry, Philadelphia, PA, USA |