| Affiliation: | 1. Division of Periodontics, Department of Dentistry, Changhua Christian Hospital, , Changhua, Taiwan;2. Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, , Taipei, Taiwan;3. Periodontal Clinics, Department of Dentistry, Taipei Medical University Hospital, , Taipei, Taiwan;4. Division of Family Dentistry, Department of Dentistry, Taipei Medical University Hospital, , Taipei, Taiwan;5. Division of Oral and Maxillofacial Surgery, Department of Dentistry, Shuang Ho Hospital, , Taipei, Taiwan;6. Division of Periodontics, College of Oral Medicine, Taipei Medical University, , Taipei, Taiwan |
