1. Center for Innovations in Quality, Effectiveness and Safety, Michael E DeBakey VA Medical Center, Houston, Texas
2. Michael E DeBakey Department of Surgery, Baylor College of Medicine, Houston, Texas
3. Section of Health Services Research, Department of Medicine, Baylor College of Medicine, Houston, Texas
4. Surgical and Perioperative Care, Atlanta VA Health Care System, Decatur, Georgia
5. Division of Surgical Oncology, Department of Surgery, Emory University School of Medicine, Atlanta, Georgia
6. Department of Surgery, Morehouse School of Medicine, Atlanta, Georgia