1. Department of Health Management Center; Mito Kyodo General Hospital; Ibaraki Japan
2. Department of Internal Medicine; Niigata University Faculty of Medicine; Niigata Japan
3. Department of Internal Medicine; University of Tsukuba Institute of Clinical Medicine; Ibaraki Japan
4. Faculty of Health and Nutrition; Yamanashi Gakuin University; Yamanashi Japan
5. Department of Clinical Trial, Design & Management; Translational Research Center; Kyoto University Hospital; Kyoto Japan