1. Tohoku University Molecular and Cellular Biochemistry, Graduate School of Pharmaceutical Sciences, , 6-3, Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8578, Japan
2. RIKEN Cluster for Pioneering Research Cellular Informatics Laboratory, , Wako, Saitama 351-0198, Japan
3. Kyoto University Department of Life Science Frontiers, Center for iPS Cell Research and Application, , 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan