1. Department of Neurology, Medical University of South Carolina, Charleston, SC, USA
2. Department of Neurosurgery, Medical University of South Carolina, Charleston, SC, USA
3. Department of Radiology, Wake Forest University, Winston-Salem, NC, USA
4. Department of Neurosurgery, Wake Forest University, Winston-Salem, NC, USA
5. Department of Neurology, Boston Medical Center, Boston, MA, USA
6. Department of Radiology, Boston Medical Center, Boston, MA, USA
7. Department of Neurosurgery, University of Iowa, Iowa City, IA, USA
8. Department of Radiology, University of Iowa, Iowa City, IA, USA
9. Department of Neurosurgery, University of South Florida, Tampa, FL, USA
10. Department of Neurology, University of South Florida, Tampa, FL, USA
11. Department of Neurosurgery, Montefiore Medical Center, NY, USA
12. Department of Neurosurgery, University of Utah, Salt Lake City, UT, USA
13. Department of Neurology, Mercy Health-St. Vincent Medical Center, Toledo, OH, USA
14. Department of Neurology, Yale School of Medicine, New Haven, CT, USA