1 Division of Clinical Basis for ES Cell Research, Center for Human ES Cell Research, Institute for Frontier Life and Medical Sciences, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan. Electronic address: kawase8@infront.kyoto-u.ac.jp.
2 Division of Clinical Basis for ES Cell Research, Center for Human ES Cell Research, Institute for Frontier Life and Medical Sciences, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.