1. Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan
2. Department of Epidemiology, Medical School, Okayama University, Japan
3. Center for General Medicine Education, School of Medicine, Keio University, Japan
4. Department of Medical Education Studies, International Research Center for Medical Education, Graduate School of Medicine, The University of Tokyo, Japan
5. Center for Innovative Clinical Medicine, Okayama University Hospital, Japan