1. From the Department of Radiology, University of Utah, Salt Lake City, Utah;
2. Ra Neurological, Omaha, Nebraska;
3. Pediatric Neurology, Lake Forest, Illinois; the
4. Department of Neurosurgery, University of Nebraska, Omaha, Nebraska; the
5. Department of Neurology, New York University, New York, New York; the
6. Epilepsy Program, Rush-Presbyterian St-Luke's Medical Center, Chicago, Illinois; and the
7. Neuroradiology Section, Veterans Administration Medical Center, Albuquerque, New Mexico.