1. Department of Gynecology, First Affiliated Hospital of Wenzhou Medical University, Wenzhou, PR China
2. Department of Radiology, First Affiliated Hospital of Wenzhou Medical University, Wenzhou, PR China
3. Department of Ultrasound Imaging, First Affiliated Hospital of Wenzhou Medical University, Wenzhou, PR China
4. Nottingham University Affiliated Hospital, Nottingham Treatment Centre, Nottingham, UK