1. Stanford Prevention Research Center; Stanford University School of Medicine; Stanford CA USA
2. Department of Epidemiology and Healthcare Research; Kyoto University School of Medicine and Public Health; Kyoto Japan
3. Department of Health and Nutritional Science, Faculty of Human Health Science; Graduate School of Health Sciences, Matsumoto University; Matsumoto Japan
4. Division of Oral Care and Rehabilitation; Kyushu Dental College; Kitakyushu Japan
5. Second Department of Oral and Maxillofacial Surgery, Department of Oral Medicine and Stomatology; School of Dental Medicine, Tsurumi University; Yokohama Japan
6. Division of Preventive Dentistry; Tohoku University, Graduate School of Dentistry; Sendai Japan
7. Department of Geriatric Dentistry; Showa University School of Dentistry; Tokyo Japan
8. Division of Geriatric Dentistry; Niigata University Medical and Dental Hospital; Niigata Japan
9. Department of Special Care Dentistry; Matsumoto Dental University; Matsumoto Japan
10. Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science; Kyushu University; Fukuoka Japan
11. Department of Oral Health, Graduate School of Medicine Dentistry and Pharmaceutical Sciences, Okayama University; Okayama Japan
12. Department of Gerodontology, Division of Oral Health Science; Graduate School of Dental Medicine, Hokkaido University; Sapporo Japan
13. Section of Preventive and Public Health Dentistry, Division of Oral Health, Growth and Development, Faculty of Dental Science; Kyushu University; Fukuoka Japan
14. Department of Dentistry and Oral Surgery; Tochigi National Hospital; Utsunomiya Japan
15. Division of Infections and Molecular Biology; Department of Health Promotion, Kyushu Dental College; Kitakyushu Japan
16. Department of Environmental Medicine; Graduate School of Medical Sciences, Kyushu University; Fukuoka Japan