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