1. Department of Stem Cell Biology Medical Research Institute Tokyo Medical and Dental University Tokyo Japan
2. Department of Dermatology Kyoto University Graduate School of Medicine Kyoto Japan
3. Department of Dermatology Shinshu University School of Medicine Matsumoto Japan
4. Division of Stem Cell Therapy Center for Stem Cell Biology and Medicine Institute of Medical Science University of Tokyo Tokyo Japan
5. Department of Reproductive Biology National Research Institute for Child Health and Development Tokyo Japan