1. Department of Radiology, Shanghai Public Health Clinical Center, Fudan University, Shanghai 201508, P. R. China
2. Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, P. R. China
3. Shanghai Institute of Medical Imaging, Fudan University, Shanghai 200237, P. R. China
4. Qingdao Institute, School of Life Medicine, Fudan University, Qingdao 266500, P. R. China