1. Department of Neurological Surgery, University of Louisville School of Medicine, Louisville, Kentucky
2. Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
3. Department of Neurological Surgery, University of California, San Francisco, California
4. Department of Neurological Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
5. Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
6. Department of Neurological Surgery, Massachusetts General Hospital, Boston, Massachusetts
7. Harvard Medical School, Boston, Massachusetts