1. Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
2. Center for Surgery and Public Health, Harvard Medical School, Harvard T. H. Chan School of Public Health, Department of Surgery, Brigham & Women’s Hospital, Boston, Massachusetts
3. International Center for Spinal Cord Injury, The Kennedy Krieger Institute, The Johns Hopkins University, Baltimore, Maryland
4. Division of Trauma, Burns, and Critical Care, Department of Surgery, Brigham & Women’s Hospital, Boston, Massachusetts