1. Department of Periodontology; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University (TMDU); Tokyo Japan
2. School of Dentistry; Chung Shan Medical University; Taichung Taiwan
3. Department of Dentistry; Chung Shan Medical University Hospital; Taichung Taiwan
4. Department of Periodontics; Sri Sankara Dental College; Varkala Kerala India
5. Department of Restorative Dentistry; University of Washington School of Dentistry; Seattle WA USA
6. Oral Diagnosis and General Dentistry; University Hospital of Dentistry; Tokyo Medical and Dental University (TMDU); Tokyo Japan
7. Center of Advanced Medicine for Dental and Oral Diseases National Center for Geriatrics and Gerontology; Aichi Japan