1. Department of Nuclear Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu 210006, P.R. China
2. Department of Pathology, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu 210006, P.R. China
3. Department of Pancreas Surgery, Fudan University Shanghai Cancer Centre, Shanghai 200032, P.R. China