1. Department of Stem Cell Biology and Histology, Tohoku University Graduate School of Medicine, Sendai, Japan
2. Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
3. Translational Research Center, Gifu University Graduate School of Medicine, Gifu, Japan
4. Center for Advanced Medicine and Clinical Research, Nagoya University Hospital, Nagoya, Japan
5. Department of Obstetrics and Gynecology, David Geffen School of Medicine at University of California Los Angeles, Los Angeles, CA, USA