1. Center for Health Equity Research and Promotion, Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, Pennsylvania2Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania
2. Surgical Service Line, Atlanta Veterans Affairs Medical Center, Atlanta, Georgia4Division of Vascular and Endovascular Therapy, Department of Surgery, Emory University, Atlanta, Georgia
3. Department of Biostatistics, University of Nebraska Medical Center, Omaha
4. Department of Genetics, Cell Biology, and Anatomy, University of Nebraska Medical Center, Omaha7Department of Surgery, University of Nebraska Medical Center, Omaha8Department of Surgery, VA Nebraska–Western Iowa Health Care System, Omaha
5. Department of Extended Care and Rehabilitation, VA Nebraska–Western Iowa Health Care System, Omaha
6. Department of Surgery, VA Nebraska–Western Iowa Health Care System, Omaha10Department of Orthopaedic Surgery, University of Utah School of Medicine, Salt Lake City
7. Department of Surgery, VA Nebraska–Western Iowa Health Care System, Omaha
8. Office of Health Operations and Management, Department of Veterans Affairs, Veterans Health Administration, Washington, DC12Department of Surgery, George Washington University School of Medicine, Washington, DC
9. Department of Surgery, University of Nebraska Medical Center, Omaha8Department of Surgery, VA Nebraska–Western Iowa Health Care System, Omaha