1. Minamisoma Municipal General Hospital, Japan
2. Department of General Medicine, Faculty of Medicine, Shimane University, Japan
3. Department of Medicine, University of Hawai'i, USA
4. Department of Internal Medicine, Mito Kyodo General Hospital, University of Tsukuba, Japan
5. Department of General Medicine, Chiba University Hospital, Japan
6. Department of Medical Education Studies, International Research Center for Medical Education, Graduate School of Medicine, The University of Tokyo, Japan
7. Department of Psychosomatic Internal Medicine, Health Sciences University of Hokkaido Hospital, Japan
8. Department of Community, General, and Family Medicine, Kumamoto University Hospital, Japan
9. Department of Internal Medicine, Itami Seifu Hosptal, Japan
10. Emergency and Critical Care Center, Kurashiki Central Hospital, Japan