1. University of Tsukuba, Faculty of Health and Sport Sciences, Tsukuba, Ibaraki, Japan
2. Medical Governance Research Institute, Minato-ku, Tokyo, Japan
3. Department of Internal medicine, Soma Central Hospital, Soma, Fukushima, Japan
4. Sakane M Clinic, Tsukuba, Ibaraki, Japan
5. University of Tsukuba, Graduate School of Comprehensive Human Sciences, Tsukuba, Ibaraki, Japan
6. Navitas Clinic, Department of Internal Medicine, Tachikawa, Tokyo, Japan