1. Department of General Medicine, Faculty of Medicine Juntendo University Tokyo Japan
2. Division of General Internal Medicine, Department of Internal Medicine St. Marianna University School of Medicine Kanagawa Japan
3. General Medicine Nerima Hikarigaoka Hospital Tokyo Japan
4. Department of Healthcare Economics and Quality Management, Graduate School of Medicine Kyoto University Kyoto Japan
5. Department of General Medicine Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences Okayama Japan
6. School of Public Health University of California Berkeley California USA
7. Department of General Medicine Saga University Hospital Saga Japan