1. Division of Comprehensive Geriatrics in Community; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
2. Departments of Nephrology and Hypertension; Fukushima Medical University; Niigata Japan
3. Division of Clinical Nephrology and Rheumatology; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
4. Sakura Clinic; Niigata Japan
5. Omori Medical Clinic; Niigata Japan
6. Maihira Clinic; Niigata Japan
7. Koyo Medical Clinic; Niigata Japan