1. Department of General Internal Medicine St. Marianna University School of Medicine Kawasaki Kanagawa Japan
2. Department of Clinical Epidemiology, Graduate School of Medicine Fukushima Medical University Fukushima Japan
3. Division of Medical Education, School of Medicine Juntendo University Tokyo Japan
4. Department of General Medicine, Shirakawa Satellite for Teaching and Research (STAR) Fukushima Medical University Fukushima Japan
5. Medicine Service VA Ann Arbor Healthcare System Ann Arbor Michigan USA
6. Department of Internal Medicine University of Michigan Medical School Ann Arbor Michigan USA
7. Department of Diagnostic and Generalist Medicine Dokkyo Medical University Hospital Tochigi Japan
8. Division of General Medicine, Center for Community Medicine Jichi Medical University Tochigi Japan
9. General Medicine Center Shimane University Hospital Izumo Shimane Japan
10. Muribushi Okinawa Center for Teaching Hospitals, Urasoe Okinawa Japan
11. Tokyo Foundation for Policy Research Tokyo Japan