Author(s): Yukiko Shimazu 1, Masayuki Endo 1, Katsuto Tamai 2 , Kei Takahashi1, Takekazu Miyoshi3, Hiroshi Hosoda4, Alan W. Flake5, Tadashi Kimura1, Jun Yoshimatsu3 1Osaka University Graduate School of Medicine, Japan; 2Osaka University Graduate School of Medicine, Japan; 3National Cerebral and Cardiovascular Center, Japan; 4National Cerebral and Cardiovascular Center, Japan; 5The Center for Fetal Research, USA