1. Department of Neurology, Baylor College of Medicine, Houston, Texas, USA.
2. Michael E. DeBakey VA Medical Center, Houston, Texas, USA.
3. Epilepsy Centers of Excellence, Veteran's Health Administration, USA.
4. Durham VA Medical Center, Durham, North Carolina, USA.
5. Neurology Division, VA Pittsburgh Healthcare System, University Drive C Pittsburgh, Pittsburgh, Pennsylvania, USA.
6. Department of Neurology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.