1 Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital Linkou Medical Center, Taoyuan, Taiwan.
2 Department of Anatomic Pathology, Chang Gung Memorial Hospital Linkou Medical Center, Taoyuan, Taiwan.
3 Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital Linkou Medical Center, Taoyuan, Taiwan. Electronic address: wang2260@gmail.com.