1. Department of Nephrology, Rheumatology, Endocrinology and Metabolism; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences; Okayama Japan
2. Department of Human Resource Development of Dialysis Therapy for Kidney Disease; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences; Okayama Japan
3. Otsuka Pharmaceutical Co., Ltd; Tokushima Japan
4. Center for Innovative Clinical Medicine, Okayama University Hospital; Okayama Japan