1. Department of Neurosurgery, Yale University School of Medicine, New Haven, Connecticut.
2. Department of Program in Cellular Neuroscience, Neurodegeneration, and Repair, Yale University School of Medicine, New Haven, Connecticut.
3. Department of Neurology, Yale University School of Medicine, New Haven, Connecticut.
4. Department of Diagnostic Radiology and Biomedical Engineering, Yale University School of Medicine, New Haven, Connecticut.
5. Department of Magnetic Resonance Research Center, Yale University School of Medicine, New Haven, Connecticut.