1. Tennessee Valley Healthcare System, Department of Veterans Affairs, Nashville, Tennessee 27212, United StatesbVanderbilt University, Department of Biomedical Engineering, Nashville, Tennessee 37232, United StatescVanderbilt University, Vanderbilt Center f
2. Vanderbilt University, Department of Biomedical Engineering, Nashville, Tennessee 37232, United States
3. Vanderbilt University, Department of Orthopaedic Surgery and Rehabilitation, Nashville, Tennessee 37232, United States