1. Department of Medical Ultrasound, Shanghai General Hospital of Nanjing Medical University, Shanghai 201600, China
2. Department of Medical Ultrasound, Xuzhou Central Hospital, Xuzhou 221009, Jiangsu, China
3. Graduate School, Xuzhou Medical University, Xuzhou 221004, Jiangsu, China
4. Department of Reproductive Medicine, Xuzhou Central Hospital, Xuzhou 221009, Jiangsu, China
5. School of Computer Science and Technology, China University of Mining and Technology, Xuzhou 221000, Jiangsu, China
6. Department of Medical Ultrasound, First People’s Hospital Affiliated with Shanghai Jiao Tong University, Shanghai 201600, China