1. Department of Kinesiology, University of Maryland, College Park, MD, United States of America
2. Neuroscience and Cognitive Science Program, University of Maryland, College Park, MD, United States of America
3. Extremity Trauma and Amputation Center of Excellence, Fort Sam Houston, TX, United States of America
4. Center for Limb Loss and Mobility, Seattle, WA, United States of America
5. Department of Mechanical Engineering, University of Washington, Seattle, WA, United States of America