1. Department of Nephrology, Uonuma Institute of Community Medicine, Niigata University Medical and Dental Hospital, Japan
2. Department of Digestive and General Surgery, Uonuma Institute of Community Medicine, Niigata University Medical and Dental Hospital, Japan
3. Department of Gastroenterology and Hepatology, Tsubame Rosai Hospital, Japan
4. Department of Orthopedic Surgery, Uonuma Institute of Community Medicine, Niigata University Medical and Dental Hospital, Japan
5. Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Science, Japan