1. State Key Laboratory of Ultrasound in Medicine and Engineering, College of Biomedical Engineering, Chongqing Medical University, Chongqing, China
2. Liuzhou Maternity and Child Healthcare Hospital, Affiliated Women and Children’s Hospital of Guangxi University of Science and Technology, Liuzhou, China
3. Xiamen Maluan Bay Hospital, Xiamen, China
4. Nanchong Central Hospital, North Sichuan Medical University, Nanchong, China
5. State Key Laboratory of Ultrasound Engineering in Medicine, School of Public Health, Chongqing Medical University, Chongqing, China
6. The Reproductive Hospital of Guangxi Zhuang Autonomous Region, China