Affiliation: | 1. Division of Periodontology, Department of Oral Medicine, Infection and Immunity, Harvard School of Dental Medicine, , Boston, MA, USA;2. Division of Periodontics, Section of Oral and Diagnostic Sciences, College of Dental Medicine, Columbia University, , New York, NY, USA;3. Department of Oral and Maxillofacial Surgery, Massachusetts General Hospital and Harvard School of Dental Medicine, , Boston, MA, USA |