1. Department of Obstetrics and Gynecology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
2. Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
3. Department of Pathology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
4. Department of General Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
5. Center for Stem Cell Research, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
6. Department of Cancer Biology, University of Cincinnati, College of Medicine, Cincinnati, Ohio 45267, USA
7. Center for Research Resources and Development, Kaohsiung Medical University, Kaohsiung 80708, Taiwan