1. Division of General Medicine Showa University Koto Toyosu Hospital Tokyo Japan
2. Diagnostic and Generalist Medicine Dokkyo Medical University Hospital Tochigi Japan
3. Department of General Medicine Juntendo University Faculty of Medicine Tokyo Japan
4. Postgraduate Clinical Training Centre Shimane University Hospital Shimane Japan
5. Department of General medicine Fukuoka University Hospital Fukuoka Japan
6. Department of Internal Medicine Kumamoto Medical Center Kumamoto Japan