[1] Kyushu Univ, Grad Sch,Fac Sci, Dept Biol, Higashi Ku, Fukuoka 8128581, Japan
[2] Japan Sci & Technol Corp, CREST, Tokyo, Japan
[3] Johns Hopkins Univ, Kennedy Krieger Inst, Dept Neurol & Pediat, Baltimore, MD USA
[4] Johns Hopkins Univ, Dept Pediat, Baltimore, MD USA
[5] Gifu Univ, Sch Med, Dept Pediat, Gifu 500, Japan