1. Department of Surgery, Henry Ford Health System, Detroit, Michigan
2. Department of Surgical Oncology, Roswell Park Cancer Institute, Buffalo, New York
3. Department of Biostatistics, Roswell Park Cancer Institute, Buffalo, New York
4. Division of Vascular and Endovascular Therapy, Department of Surgery, Emory University, Atlanta, Georgia
5. Surgical Service Line, Atlanta VA Medical Center, Decatur, Georgia
6. Center for Health Equity Research and Promotion, Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, Pennsylvania
7. Department of Surgery, University of Pittsburgh, Pittsburgh
8. Department of Surgery, University of Nebraska Medical Center, Omaha
9. VA Health Services Research and Development Service, Center for Innovations in Quality, Effectiveness and Safety, Michael E DeBakey VA Medical Center, Houston, Texas
10. Michael E DeBakey Department of Surgery, Baylor College of Medicine, Houston, Texas