1. Department of Orthopaedic Surgery, Vanderbilt University Medical Center, Nashville, TN, USA
2. Department of Physical Therapy, The University of Texas Medical Branch, Galveston, TX, USA
3. Department of Orthopaedic Surgery and Rehabilitation, The University of Texas Medical Branch, Galveston, TX, USA
4. Department of Orthopaedic Surgery, The Cleveland Clinic Foundation, Cleveland, OH, USA
5. Department of Physical Medicine and Rehabilitation, Vanderbilt University Medical Center, Nashville, TN, USA