1. Department of Gastrointestinal Surgery II, Key Laboratory of Hubei Province for Digestive System Disease, Renmin Hospital, Wuhan University, Wuhan 430060, China
2. Department of Colon and Rectal Surgery, Columbia University Medical Center, New York, NY 10032, USA
3. Department of Pathology and David Rubenstein Pancreatic Cancer Research Center, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
4. Department of Surgery, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
5. Department of Oncology, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
6. Department of Urology, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA