1. Neurophysiology of Epilepsy Unit, NINDS, National Institutes of Health , Bethesda, MD 20892 , USA
2. Surgical Neurology Branch, NINDS, National Institutes of Health , Bethesda, MD 20892 , USA
3. NIH MRI Research Facility, NINDS, National Institutes of Health , Bethesda, MD 20892 , USA
4. Clinical Epilepsy Section, NINDS, National Institutes of Health , Bethesda, MD 20892 , USA