1. Department of Healthcare Epidemiology, School of Public Health in the Graduate School of Medicine; Kyoto University; Kyoto Japan
2. Division of Nephrology, Department of Medicine; Showa University School of Medicine; Tokyo Japan
3. Department of Blood Purification; Tokyo Women's Medical University Hospital; Tokyo Japan
4. Division of Nephrology and Metabolism, Department of Medicine; Tokai University School of Medicine; Sagamihara Japan
5. National Graduate Institute for Policy Studies; Tokyo Japan