1. Department of Public Health and Hygiene, Graduate School of Medicine, University of the Ryukyus
2. Faculty of Health Sciences, Hokkaido University
3. Department of Public Health, Hokkaido University Faculty of Medicine
4. The Hokkaido Centre for Family Medicine
5. Suttu Municipal Clinic
6. School of Medical Technology, Faculty of Health Science, Gunma Paz University
7. Department of Nutrition, Sapporo University of Health Sciences