1. Department of Surgery, College of Medicine The Pennsylvania State University, College of Medicine Hershey Pennsylvania USA
2. Program for Liver, Pancreas, & Foregut Tumors, Department of Surgery, College of Medicine The Pennsylvania State University Hershey Pennsylvania USA
3. Department of Public Health Sciences, College of Medicine The Pennsylvania State University Hershey Pennsylvania USA
4. Section of Surgical Oncology, Division of Surgery Baptist MD Anderson Cancer Center Jacksonville Florida USA