1. Department of International and Community Oral Health, Tohoku University Graduate School of Dentistry
2. Health Prevention Division, Health and Welfare Department, Ibaraki Prefecture Office
3. Department of Public Health, Dokkyo Medical University School of Medicine
4. Ibaraki Health Plaza
5. Ibaraki Health Service Association
6. Department of Community Medical Supports, Tohoku Medical Megabank Organization, Tohoku University
7. Department of Global Health Promotion, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU)
8. Japan Society for the Promotion of Science
9. Department of Quality and Safety of Oral Healthcare, Radboud University Medical Center