1. Neuroscience Graduate Program, Vanderbilt University, Nashville, Tennessee.
2. Vanderbilt Kennedy Center for Research on Human Development, Vanderbilt University, Nashville, Tennessee.
3. Department of Neurology, Vanderbilt University, Nashville, Tennessee.
4. Department of Neurosurgery, Vanderbilt University, Nashville, Tennessee.
5. Department of Radiology, Vanderbilt University, Nashville, Tennessee.