[1] Tokyo Womens Med Univ, Dept Pediat Nephrol, Tokyo, Japan
[2] Hokkaido Univ, Dept Pediat, Grad Sch Med, Sapporo, Hokkaido, Japan
[3] Saitama Med Univ, Dept Pediat, Saitama, Japan
[4] Chiba Childrens Hosp, Dept Nephrol, Chiba, Japan
[5] Miyazaki Univ, Div Pediat, Dept Reprod & Dev Med, Fac Med, Miyazaki, Japan
[6] Okayama Univ Hosp, Dept Pediat, Okayama, Japan
[7] Natl Ctr Child Hlth & Dev, Organ Transplantat Ctr, Tokyo, Japan
[8] Tokyo Womens Med Univ, Dept Surg, Kidney Ctr, Tokyo, Japan
[9] Tokyo Womens Med Univ, Dept Urol, Tokyo, Japan