1. Department of Veterans Affairs RR&D Center of Excellence for Limb Loss Prevention and Prosthetic Engineering; VA Puget Sound Health Care System; Seattle Washington 98108
2. School of Medicine; University of Washington; Seattle WA 98195
3. Department of Orthopaedics & Sports Medicine; University of Washington; Seattle Washington 98195
4. Department of Mechanical Engineering; University of Washington; Seattle Washington 98195