1. Department of Neurology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, USA
2. Department of Physical Medicine and Rehabilitation, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, USA
3. Department of Neurology, University of Texas Southwestern Medical Center at Dallas, and The Center for Brain Health at the University of Texas at Dallas, Dallas, TX, USA
4. Department of Neurology, University of Texas Southwestern Medical Center at Dallas, and Department of Neurology, Dallas VA Medical Center, Dallas, TX, USA
5. Department of Urology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, USA
6. Department of Neurology, University of Texas Southwestern Medical Center at Dallas, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA