1. Department of Neurosurgery, University of Colorado Anschutz Medical Campus, Aurora, Colorado, United States
2. Department of Bioengineering, University of Colorado Anschutz Medical Campus, Aurora, Colorado, United States
3. Department of Neurology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, United States
4. Department of Computer Science and Engineering, University of Colorado Denver, Denver, Colorado, United States