1. Center for the Intrepid, Department of Rehabilitation Medicine, Brooke Army Medical Center, Ft. Sam Houston, TX 78234, USA
2. The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, MD 20817, USA
3. The Center for Rehabilitation Sciences Research, Department of Rehabilitation Medicine, Uniformed Services University, Bethesda, MD 20814, USA
4. Extremity Trauma and Amputation Center of Excellence, Ft. Sam Houston, TX 78234, USA
5. Army-Baylor University DPT Program, Ft. Sam Houston, TX 78234, USA
6. Sentier Strategic Resources, Austin, TX 78701, USA
7. Center for Limb Loss and Mobility, Seattle, WA 98108, USA