1. Department of Internal Medicine, Mito Kyodo General Hospital, University of Tsukuba, Ibaraki, Japan
2. Division Medical Education, Juntendo University School of Medicine, Tokyo, Japan
3. Department of Information and Computer Technology, Faculty of Engineering, Tokyo University of Science, Tokyo, Japan
4. Department of Diagnostic and Generalist Medicine, Dokkyo Medical University Hospital, Tochigi, Japan
5. Research Division, National Center for University Entrance Examinations, Tokyo, Japan
6. Division of General Medicine, Center for Community Medicine, Jichi Medical University School of Medicine, Tochigi, Japan
7. Education Adviser Japan Organization of Occupational Health and Safety, Kanagawa, Japan
8. Muribushi Okinawa for Teaching Hospitals, Okinawa, Japan