[1] Nagoya Daini Hosp, Aichi Med Ctr, Japanese Red Cross Hosp, Dept Pediat Nephrol,Showa Ku, 2-9 Myoken Cho, Nagoya, Aichi 4668650, Japan
[2] Japanese Red Cross Toyota Coll Nursing, Dept Clin Med, 12-33 Nanamagari,Hakusan Cho, Toyota, Aichi 4718565, Japan
[3] Natl Ctr Child Hlth & Dev, Dept Nephrol & Rheumatol, Setagaya Ku, 2-10-1 Okura, Tokyo 1578535, Japan
[4] Shiga Univ Med Sci, Dept Pediat, Shiga 5202192, Japan
[5] Toho Univ, Fac Med, Dept Nephrol, Ota Ku, 6-11-1 Oomorinishi, Tokyo 1438541, Japan
[6] Hokkaido Med Ctr, Dept Pediat, Nishi Ku, 5-7-1-1 Yamanote 5jyo, Sapporo, Hokkaido 0630005, Japan
[7] Tokyo Metropolitan Childrens Med Ctr, Dept Nephrol, 2-8-29 Musasidai, Tokyo, Tokyo 1838561, Japan