1. Department of Radiology, The Affiliated Hospital of Medical School, Ningbo University, Ningbo, Zhejiang 315020, P.R. China
2. Department of Radiology, Changhai Hospital, Second Military Medical University, Shanghai 200433, P.R. China
3. Department of Nuclear Medicine, Changhai Hospital, Second Military Medical University, Shanghai 200433, P.R. China
4. Department of Pathology, Ningbo Second Hospital, Ningbo, Zhejiang 315010, P.R. China
5. Department of Pathology, Changhai Hospital, Second Military Medical University, Shanghai 200433, P.R. China