1. Dialysis Unit, University Hospital of the Ryukyus, Okinawa, Japan
2. Division of Nephrology, Kanazawa University Hospital, Kanazawa, Ishikawa, Japan
3. Department of Cardiovascular Medicine, Nephrology and Neurology, Faculty of Medicine, University of the Ryukyus, Okinawa, Japan
4. Department of Nephrology, Fujita Health University Hospital, Toyoake, Aichi, Japan
5. Department of Pathology, Clinical Research Center, National Hospital Organization Chiba-East National Hospital, Chiba, Chiba, Japan
6. Health Administration Center, Niigata University, Niigata, Niigata, Japan
7. Clinical Pharmacology and Therapeutics, Tohoku University Graduate School of Pharmaceutical Sciences, Aoba-ku, Sendai, Japan
8. Department of Pathology, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
9. Nephrology Center, Toranomon Hospital, Minato, Tokyo, Japan
10. Department of Pathology, Dokkyo Medical University Koshigaya Hospital, Koshigaya, Saitama, Japan
11. Division of Nephrology and Kidney Center, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan
12. Department of Nephrology, Kanazawa Medical University School of Medicine, Uchinada, Ishikawa, Japan
13. Second Department of Internal Medicine, Nagasaki University School of Medicine, Nagasaki, Japan
14. Department of Nephrology, Rheumatology, Endocrinology and Metabolism, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Kita-ku, Okayama, Japan
15. Division of Nephrology and Hypertension, Department of Internal Medicine, St. Marianna University School of Medicine, Yokohama, Kanagawa, Japan
16. Tokyo Takanawa Hospital, Minato-ku, Tokyo, Japan
17. Division of Metabolism and Biosystemic Science, Department of Medicine, Asahikawa Medical University, Asahikawa, Hokkaido, Japan
18. Division of Nephrology, Department of Internal Medicine, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya, Japan
19. Department of Nephrology and Laboratory Medicine, Kanazawa University, Kanazawa, Ishikawa, Japan