1. Department of Cardiovascular Surgery, Okayama University Hospital, Okayama, Japan
2. Department of Nephrology, Rheumatology, Endocrinology and Metabolism, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
3. Department of Internal Medicine, Innoshima General Hospital, Hiroshima, Japan
4. Department of Chronic Kidney Disease and Cardiovascular Disease, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
5. Division of Nephrology and Dialysis, Department of Internal Medicine, Nippon Kokan Fukuyama Hospital, Hiroshima, Japan
6. Department of Human Resource Development of Dialysis Therapy for Kidney Disease, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
7. Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Osaka, Japan