| Affiliation: | 1. School of Dentistry, National Taiwan University, Taipei, Taiwan;2. School of Dentistry, National Taiwan University, Taipei, Taiwan Division of Periodontics, Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan;3. Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan;4. Department of Dentistry, Far Eastern Memorial Hospital, New Taipei, Taiwan;5. Department of Dentistry, Shin-Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan |
