1. Physical Medicine and Rehabilitation Alliance of Baylor College of Medicine and the University of Texas-Houston Medical School, Houston, Texas.
2. Department of Neurology, Baylor College of Medicine, Houston, Texas.
3. Department of Pediatrics, Baylor College of Medicine, Houston, Texas.
4. Michael E. DeBakey Veterans Affairs Medical Center, Houston, Texas.
5. Department of Pediatric Radiology, Baylor College of Medicine, Houston, Texas.
6. Department of Neurosurgery, Baylor College of Medicine, Houston, Texas.
7. Department of Emergency Medicine, University of Texas Medical School, Houston, Texas.
8. Department of Emergency Medicine, Memorial-Hermann Hospital, Houston, Texas.