1. Department of Radiology, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou, Zhejiang 310003, China
2. Department of Radiology, Sanmen County People’s Hospital, Sanmen, Zhejiang 317100, China
3. Radiology Section, University Hospitals, University of Leuven, 3000 Leuven, Belgium