[1] Kawasaki Med Sch, Dept Nephrol & Hypertens, Kurashiki, Okayama, Japan
[2] Jikei Univ, Div Nephrol & Hypertens, Dept Internal Med, Sch Med, Tokyo, Japan
[3] Ageo Cent Gen Hosp, Dept Nephrol, Ageo, Japan
[4] Shinshu Univ, Dept Nephrol, Sch Med, Matsumoto, Nagano, Japan
[5] Kyoto Univ, Human Hlth Sci, Grad Sch Med, Kyoto, Japan
[6] Kyoto Univ, Dept Healthcare Epidemiol, Grad Sch Med, Kyoto, Japan