1. Ultrasonography Department, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
2. Shengli Clinical Medical College of Fujian Medical University, Fuzhou No. 1 Hospital Affiliated with Fujian Medical University, Fuzhou, China
3. Department of Ultrasonography, Fujian Provincial Hospital, Shengli Clinical Medical College of Fujian Medical University, Fuzhou, China
4. School of Health Science of Purdue University, West Lafayette, IN, USA