[1] Fukuoka Univ, Sch Med, Dept Pediat, Fukuoka 81401, Japan
[2] Natl Ctr Neurol & Psychiat, Dept Child Neurol, Kodaira, Tokyo, Japan
[3] Univ Tokyo, Grad Sch Med, Dept Neurol, Tokyo, Japan
[4] Univ Tokyo, Grad Sch Frontier Sci, Dept Computat Biol, Kashiwa, Chiba, Japan
[5] Chiba Childrens Hosp, Dept Neurol, Chiba, Japan
[6] Kanagawa Childrens Med Ctr, Div Child Neurol, Yokohama, Kanagawa, Japan
[7] Osaka Med Ctr, Div Child Neurol, Izumi, Japan
[8] Res Inst Maternal & Child Hlth, Izumi, Japan
[9] Tokyo Womens Med Univ, Dept Pediat, Tokyo, Japan