1. Department of Neurological Surgery, University of Virginia, Charlottesville, VA, USA
2. Department of Neurosurgery, University of Miami Miller School of Medicine, University of Miami Hospital, Jackson Memorial Hospital, Miami Children’s Hospital, Miami, FL, USA
3. Department of Neurosurgery, Rush School of Medicine, Chicago, IL, USA
4. Department of Neurosurgery, Thomas Jefferson University, Philadelphia, PA, USA
5. Department of Neurological Surgery, University of Iowa, Iowa City, IA, USA
6. Department of Neurological Surgery, Tulane University, New Orleans, LA, USA
7. Department of Radiology, University of Miami Miller School of Medicine, University of Miami Hospital and Jackson Memorial Hospital, Miami, FL, USA