[1] Keio Univ, Sch Med, Div Med Genet, Dept Pediat,Shinjuku Ku, Tokyo 1608582, Japan
[2] Childrens Natl Med Ctr, Dept Clin Genet & Mol Med, Tokyo, Japan
[3] Asahikawa Med Coll, Dept Pediat, Asahikawa, Hokkaido 078, Japan
[4] Osaka Med Ctr, Dept Planning & Res, Osaka, Japan
[5] Res Inst Maternal & Child Hlth, Osaka, Japan
[6] Tokyo Metropolitan Kiyose Childrens Hosp, Dept Neonatol, Tokyo, Japan
[7] Tokyo Metropolitan Kiyose Childrens Hosp, Dept Cardiol, Tokyo, Japan
[8] Yamato Municipal Hosp, Dept Pediat, Kanagawa, Japan
[9] Ibaraki Childrens, Dept Pediat, Ibaraki, Japan
[10] Kagoshima City Hosp, Dept Pediat, Kagoshima, Japan
[11] Shinshu Univ, Sch Med, Dept Med Genet, Nagano, Japan
[12] Childrens Hosp, Div Clin Genet, Nagano, Japan