1. Department of Physical Medicine and Rehabilitation University of Alabama at Birmingham Birmingham Alabama USA
2. UT Southwestern Medical School Dallas Texas USA
3. Riverside Community Hospital Riverside California USA
4. Department of Neurosurgery UT Southwestern Medical Center Dallas Texas USA
5. Department of Computer Science, Erik Jonsson School of Engineering and Computer Science The University of Texas at Dallas Richardson Texas USA
6. PM&R Service, VA North Texas Health Care System, Department of PM&R UT Southwestern Medical Center Dallas Texas USA