1. Second Affiliated Hospital, Institute of Ultrasound Imaging, Chongqing Medical University, Chongqing 400010, P.R. China
2. Department of Ultrasound, Central Hospital of Wuhan, Tongji Medical College Huazhong University of Science & Technology, Wuhan, 430014, P.R. China
3. Department of Ultrasound, Renmin Hospital of Wuhan University, Wuhan, 430060, P.R. China
4. Department of Interventional Ultrasound, Chinese PLA General Hospital, Beijing, 100853, P. R. China
5. Department of Ultrasound, Chongqing Cancer Institute & Hospital & Cancer, Chongqing 400030, P.R. China
6. Department of Ultrasound, the First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, P.R. China
7. Department of Ultrasound, Zhongda Hospital, Southeast University, Nanjing 210009, P.R. China