Affiliation: | 1. Departments of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA;2. Department of Oral Pathology, Peking University School of Stomatology, Beijing, People's Republic of China;3. Orthodontics and Pediatric Dentistry, University of Michigan School of Dentistry, Ann Arbor, MI, USA;4. Department of Biological Chemistry, University of Michigan School of Medicine, Ann Arbor, MI, USA |