1. Department of Health Policy and Management and Center for Health Decision Science, Harvard School of Public Health, Boston, Massachusetts.
2. Division of Trauma, Burns and Surgical Critical Care, Department of Surgery, Brigham and Women's Hospital/Harvard Medical School, Boston, Massachusetts.
3. Department of Surgery, Temple University School of Medicine, Philadelphia, Pennsylvania.
4. Division of Infectious Disease, Department of Medicine, Brigham and Women's Hospital/Harvard Medical School, and Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, Massachusetts.
5. Division of Acute Care Surgery, Department of Surgery, Virginia Commonwealth University, Richmond, Virginia.