[1] Kawasaki Municipal Tama Hosp, Dept Internal Med, Div Gen Internal Med, Kawasaki, Kanagawa, Japan
[2] Yokohama City Univ, Dept Gen Med, Sch Med, Yokohama, Kanagawa, Japan
[3] Kawasaki Municipal Tama Hosp, Dept Internal Med, Div Nephrol & Hypertens, Kawasaki, Kanagawa, Japan