1 Department of Health Care Policy and Health Economics, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki, 305-8577, Japan.
2 Department of Nephrology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan.
3 Department of Clinical Laboratory Medicine, University of Tsukuba Hospital, Tsukuba, Ibaraki, Japan.
4 Department of Urology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan.
5 Department of Health Care Policy and Health Economics, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki, 305-8577, Japan. [email protected].
6 Division of Nephrology and Hypertension, Department of Internal Medicine, Iwate Medical University School of Medicine, Yahaba, Japan.
7 Okinawa Heart and Renal Association (OHRA), Naha, Okinawa, Japan.
8 Department of Hemovascular Medicine and Artificial Organs, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan.
9 Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Science, Niigata, Niigata, Japan.