1. Department of Epidemiology, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
2. Department of Epidemiology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences
3. Okayama University Health Service Center
4. Office of Innovative Medicine, Organization for Research Strategy and Development, Okayama University
5. Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences