1. Surgical Outcomes and Applied Research, Department of Surgery, University of Colorado School of Medicine, Aurora, CO
2. Department of Surgery, University of Colorado School of Medicine, Aurora, CO
3. Adult and Child Center for Health Outcomes Research and Delivery Science, University of Colorado School of Medicine, Aurora, CO, USA
4. Department of Quality and Safety, University of Colorado School of Medicine, Aurora, CO
5. Department of Surgery, UCHealth Memorial Hospital, Colorado Springs, CO
6. Department of Anesthesiology, UCHealth Poudre Valley Hospital. Fort Collins, CO
7. Department of Anesthesiology and Critical Care, University of Colorado School of Medicine, Aurora, CO
8. Department of Surgery, Inova Fairfax Medical Center, Fairfax, VA
9. Department of Surgery, University of Virginia Medical Center, Charlottesville, VA