1. Department of Neurology; Illinois Neurologic Institute, University of Illinois College of Medicine; Peoria IL
2. Department of Radiology; Illinois Neurologic Institute, University of Illinois College of Medicine; Peoria IL
3. Department of Neurosurgery; Illinois Neurologic Institute, University of Illinois College of Medicine; Peoria IL
4. Department of the Center for Outcomes Research; University of Illinois College of Medicine; Peoria IL