1. Department of Physical Therapy & Rehabilitation Science, University of Iowa, Iowa City, IA, USA
2. Department of Orthopedics and Rehabilitation, University of Iowa Carver College of Medicine, Iowa City, IA, USA
3. Carl R. Darnall Army Medical Center, Fort Hood, TX USA
4. Brain Injury Rehabilitation Service, Department of Rehabilitation Medicine, Brooke Army Medical Center, Fort Sam Houston, TX, USA
5. Intrepid Spirit TBI Clinic, Fort Hood, TX USA
6. Department of Orthopaedic Surgery, Vanderbilt University Medical Center, Nashville, TN, USA