1. Department of Surgery Johns Hopkins University Baltimore Maryland USA
2. Department of Surgery Division of Surgical Oncology, The Ohio State University Wexner Medical Center Columbus Ohio USA
3. Division of Hepatobiliary and Pancreas Surgery, Mayo Clinic Rochester Minnesota USA
4. Department of Surgical Oncology University of Texas MD Anderson Cancer Center Houston Texas USA
5. Department of Gastrointestinal Oncology and Oncologic Sciences Moffitt Cancer Center, Morsani College of Medicine Tampa Florida USA
6. Department of Surgery, Division of Surgical Oncology University of California San Diego California USA
7. Department of Surgery Division of Surgical Oncology, Medical College of Wisconsin Milwaukee Wisconsin USA
8. Department of Surgery University of Cincinnati College of Medicine Cincinnati Ohio USA
9. Department of Surgery Division of Surgical Oncology, University of Massachusetts Medical School Worcester Massachusetts USA
10. Department of Surgery, Division of Surgical Oncology University of Wisconsin Madison Wisconsin USA
11. Department of Surgery Division of Surgical Oncology, City of Hope National Medical Center Duarte California USA
12. Division of Surgical Oncology, Winship Cancer Institute Emory University Atlanta Georgia USA