1. Clinical Epilepsy Section, National Institute of Neurological Disorders and Stroke; Bethesda MD
2. Surgical Neurology Branch, National Institute of Neurological Disorders and Stroke; Bethesda MD
3. Scientific and Statistical Computing Core, National Institute of Mental Health; Bethesda MD
4. Electroencephalography Section, National Institute of Neurological Disorders and Stroke; Bethesda MD