1. Department of Neurosurgery, Baylor College of Medicine, Houston, Texas, USA.
2. Department of Physical Medicine and Rehabilitation, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
3. Brain Rehabilitation Research Center, Malcolm Randall VA Medical Center, Gainesville, Florida, USA.
4. Department of Psychiatry, College of Medicine, University of Florida, Gainesville, Florida, USA.
5. Department of Emergency Medicine, College of Medicine, University of Florida, Gainesville, Florida, USA.
6. Department of Neurology, State University of New York-Downstate Health Sciences University, Brooklyn, New York, USA.