1 Department of Pancreatic Surgery, Pancreatic Disease Institute, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China.
2 Department of Pathology, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China.
3 Department of Pancreatic Surgery, Pancreatic Disease Institute, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China. Electronic address: yffudan98@126.com.