1. The Committee of Renal Data Registry, the Japanese Society for Dialysis Therapy , Tokyo , Japan
2. Department of Nephrology, Tokyo Women's Medical University , Tokyo , Japan
3. Division of Nephrology, Hypertension and Endocrinology, Department of Medicine, Nihon University School of Medicine , Tokyo , Japan
4. Department of Nephrology, Nagoya City University Graduate School of Medical Sciences , Aichi , Japan
5. Showa University Research Administration Center (SURAC); Division of Nephrology, Department of Medicine, School of Medicine; Department of Hygiene, Public Health and Preventive Medicine, Graduate School of Medicine, Showa University , Tokyo , Japan
6. Department of Nephrology, Kitasaito hospital , Asahikawa , Japan
7. Department of Clinical Engineering, Fujita Health University , Aichi , Japan
8. Yabuki Hospital , Yamagata , Japan