1. Department of Biological Sciences; Graduate School of Science; The University of Tokyo; 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
2. Department of Molecular Oncology; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University; 1-5-45 Yushima, Bunkyo-ku Tokyo 113-8519 Japan
3. Faculty of Community Health Care; Department of Nursing; Teikyo Heisei University; 6-19 Chiharadainishi Ichihara-city Chiba 290-0192 Japan
4. Research Center for Stem Cell Engineering; National Institute of Advanced Industrial Science and Technology (AIST); Tsukuba Central 4 Tsukuba Ibaraki 305-8562 Japan
5. Department of Life Sciences; Graduate School of Arts and Sciences; The University of Tokyo; Tokyo 153-8902 Japan
6. Second Department of Internal Medicine; Wakayama Medical University; Kimiidera 811-1 Wakayama 641-8509 Japan