1. Division of General Internal Medicine Department of Medicine St. Luke’s International Hospital Tokyo Japan
2. Department of Epidemiology St. Luke's International University Graduate School of Public Health Tokyo Japan
3. Fujita Health University Toyoake Japan
4. Department of General Medicine Juntendo University Faculty of Medicine Tokyo Japan
5. Department of Gastroenterology St. Luke’s International Hospital Tokyo Japan
6. The Center for Preventive Medicine St. Luke’s International Hospital Tokyo Japan
7. Ohta Nishinouchi Hospital Koriyama Japan