1. Cellular and Molecular Biotechnology Research Institute, Multicellular System Regulation Research Group, National Institute of Advanced Industrial Science and Technology , Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566 , Japan
2. Department of Surgery, University of Tsukuba , 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8575 , Japan
3. FUJIFILM Corporation , 6-1 Takada, Amagasaki, Hyogo 661-0963 , Japan
4. FUJIFILM Wako Pure Chemical Corporation , 3-8, Doshomachi 2-Chome, Chuo-ku, Osaka 540-8605 , Japan