[1] Kurume Univ, Sch Med, Dept Pediat, Kurume, Fukuoka 830, Japan
[2] Kurume Univ, Sch Med, CV Res Inst, Kurume, Fukuoka 830, Japan
[3] Kurume Univ, Sch Med, Dept Internal Med 3, Kurume, Fukuoka 830, Japan
[4] Tanabe Seiyaku Co Ltd, Discovery Res Lab, Kashima, Japan