1. Department of Obstetrics and Gynecology, Kaohsiung Chang Gung Memorial Hospital; Chang Gung University College of Medicine, Kaohsiung, Taiwan
2. Department of Diagnostic Radiology, Kaohsiung Chang Gung Memorial Hospital; Chang Gung University College of Medicine, Kaohsiung, Taiwan
3. Department of Obstetrics and Gynecology, Xiamen Chang Gung Hospital, Xiamen, Fujian, China