1. Department of Ultrasound, Zhongshan Hospital, Fudan University, Shanghai 200032, China
2. Department of Ultrasound, Xinhua Hospital, Shanghai Jiao Tong Universitity School of Medicine, Shanghai 200092, China
3. Department of Pathology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
4. Department of Radiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China