1. Department of Emergency Medicine, Brown University, Providence, Rhode Island, USA.
2. Department of Neurosurgery, Brown University, Providence, Rhode Island, USA.
3. Department of Neurosurgery, University of Florida, Gainesville, Florida, USA.
4. Department of Neurosurgery, Brigham and Women's Hospital, Boston, Massachusetts.
5. Department of Information Systems and Operation Management, University of Florida, Gainesville, Florida, USA.
6. Department of Biostatistics, Medical University of South Carolina, Charleston, South Carolina, USA.
7. Department of Radiology and Imaging Sciences, Emory University, Atlanta, Georgia, USA.
8. Department of Emergency Medicine, Emory University, Atlanta, Georgia, USA.
9. Department of Radiology, University of Florida, Gainesville, Florida, USA.
10. Department of Emergency Medicine, Virginia Commonwealth University, Richmond, Virginia, USA.