1. Department of Neurosurgery, University of California, Los Angeles, School of Medicine, Los Angeles, California.
2. The Interdepartmental Program for Neuroscience, University of California, Los Angeles, School of Medicine, Los Angeles, California.
3. The UCLA Brain Injury Research Center, University of California, Los Angeles, School of Medicine, Los Angeles, California.
4. Department of Neurology, University of California, Los Angeles, School of Medicine, Los Angeles, California.
5. Department of Molecular and Medical Pharmacology, University of California, Los Angeles, School of Medicine, Los Angeles, California.