[1] Gadjah Mada Univ, Acad Hosp, Div Nephrol & Hypertens, Yogyakarta, Indonesia
[2] Gadjah Mada Univ, Fac Med, Div Nephrol & Hypertens, Yogyakarta, Indonesia
[3] Gadjah Mada Univ, Dept Math & Nat Sci, Yogyakarta, Indonesia
[4] Juntendo Univ, Fac Med, Dept Internal Med, Div Nephrol, Tokyo, Japan