1. Center for Surgery and Public Health, Department of Orthopaedic Surgery, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
2. Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, Maryland
3. Department of Orthopaedic Surgery, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
4. Harvard Medical School, Boston, Massachusetts
5. Center for Surgery and Public Health, Department of Surgery, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
6. Center for Health Services Research, Uniformed Services University of the Health Sciences, Bethesda, Maryland