1. Department of Pancreatic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
2. Markey Cancer Center, University of Kentucky, Lexington, Kentucky.
3. Department of Surgery, University of Kentucky, Lexington, Kentucky.
4. Department of Pathology and Laboratory Medicine, University of Kentucky, Lexington, Kentucky.
5. Department of Microbiology, Immunology and Molecular Genetics, University of Kentucky, Lexington, Kentucky.