[1] Nagoya City Univ, Grad Sch Med Sci, Dept Pediat & Neonatol, Ctr Human Dev & Family Sci, Nagoya, Aichi, Japan
[2] Kurume Univ, Sch Med, Ctr Dev & Cognit Neurosci, Kurume, Fukuoka, Japan
[3] Kurume Univ, Sch Med, Dept Obstet & Gynaecol, Kurume, Fukuoka, Japan
[4] Kyushu Univ, Grad Sch Med Sci, Dept Hlth Sci, Fukuoka, Fukuoka, Japan