1. Uniformed Services University of the Health Sciences, Bethesda, MD, USA
2. Division of Orthopaedics, Department of Surgery, Walter Reed National Military Center, Bethesda, MD, USA
3. Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, MD, USA
4. Division of Plastics and Reconstructive Surgery, Department of Surgery, Walter Reed National Military Center, Bethesda, MD, USA