1. First Department of Pathology, Kansai Medical University, Osaka, Japan
2. Department of Surgery, Kansai Medical University, Osaka, Japan
3. Transplantation Center, Kansai Medical University, Osaka, Japan
4. Regeneration Research Center for Intractable Diseases, Osaka, Japan
5. Department of Gynecology, Kansai Medical University, Osaka, Japan