Affiliation: | 1. Midwestern University Clinics, Glendale, Arizona, USA Private Practice, Avondale, Arizona, USA;2. Department of Periodontics, University of Louisville School of Dentistry, Louisville, Kentucky, USA;3. Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA;4. Department of Periodontics, College of Dentistry, University of Iowa, Iowa City, Iowa, USA;5. Department of Periodontics & Oral Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA |