1. Department of Physical Medicine and Rehabilitation, University of Texas McGovern Medical School, Houston, TX, USA
2. TIRR Memorial Hermann - The Woodlands, Shenandoah, TX, USA
3. Department of Physical Medicine and Rehabilitation, Indiana University School of Medicine, Indianapolis, IN, USA
4. Rehabilitation Hospital of Indiana, Indianapolis, IN, USA
5. Department of Rehabilitation Programs, Madonna Rehabilitation Hospitals, Lincoln, NE, USA