1. Departments of Neurosurgery and Psychiatry, University of Colorado at Denver and Health Sciences Center, Denver, Colorado
2. Department of Mathematical Sciences, University of Colorado at Denver and Health Sciences Center, Denver, Colorado
3. Department of Pediatrics, University of Colorado at Denver and Health Sciences Center, Denver, Colorado
4. Department of Neurological Surgery, Northwestern University Feinberg School of Medicine, Evanston Northwestern Healthcare, Evanston, Illinois