Affiliation: | 1. Department of Periodontics & Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI;2. Division of Anatomy, Department of Surgery, University of Michigan Medical School, Ann Arbor, MI;3. Department of Periodontics & Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI Department of Oral and Maxillofacial Pathology, University of Michigan School of Dentistry, Ann Arbor, MI |