Affiliation: | 1. Division of Research and Optimal Patient Care, American College of Surgeons, Chicago, Illinois Department of Surgery, Surgical Outcomes and Quality Improvement Center, Feinberg School of Medicine, Northwestern University, Chicago, Illinois Northwestern Institute for Comparative Effectiveness Research in Oncology, Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, Illinois;2. Department of Surgery, Surgical Outcomes and Quality Improvement Center, Feinberg School of Medicine, Northwestern University, Chicago, Illinois;3. Department of Surgery, Surgical Outcomes and Quality Improvement Center, Feinberg School of Medicine, Northwestern University, Chicago, Illinois Department of Surgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania;4. Division of Research and Optimal Patient Care, American College of Surgeons, Chicago, Illinois;5. Division of Research and Optimal Patient Care, American College of Surgeons, Chicago, Illinois Department of Surgery, David Geffen School of Medicine at the University of California, Los Angeles, California VA Greater Los Angeles Healthcare System, Los Angeles, California;6. Department of Surgery, Surgical Outcomes and Quality Improvement Center, Feinberg School of Medicine, Northwestern University, Chicago, Illinois Northwestern Institute for Comparative Effectiveness Research in Oncology, Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, Illinois |