1. Department of Ultrasound, Chinese PLA General Hospital, Beijing, China;
2. School of Medicine, Nankai University, Tianjin, China;
3. Department of Gastroenterology, The Second Affiliated Hospital of Chongqing Medical University & Chongqing Key Laboratory of Ultrasound Molecular Imaging, Chongqing, China;
4. Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China;
5. Ultrasound Department, Xijing Hospital, Fourth Military Medical University, Xi’an, China;
6. State Key Laboratory of Ultrasound Engineering in Medicine Co-Founded by Chongqing and the Ministry of Science and Technology, Chongqing Medical University, Chongqing, China;
7. Chongqing Key Laboratory of Ultrasound Molecular Imaging, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China;
8. Department of Ultrasound, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China