1. Department of Obstetrics and Gynecology, Chi‑Mei Medical Center, Tainan 710, Taiwan, R.O.C.
2. Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan, R.O.C.
3. Department of Cell Biology and Anatomy, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan, R.O.C.
4. Division of General Surgery, Department of Surgery, National Cheng Kung University Hospital, Tainan 704, Taiwan, R.O.C.