1. Department of Radiology and Radiological Sciences, Johns Hopkins University, Baltimore, MD 21218, USA
2. Cooper Medical School, Rowan University, Camden, NJ 08028, USA
3. Department of Biostatistics, West Virginia University, Morgantown, WV 26506, USA
4. Department of Neurosurgery, Johns Hopkins University, Baltimore, MD 21218, USA
5. Department of Radiology, Harvard Medical School, Boston, MA 02115, USA
6. Department of Radiology, Université Libre De Bruxelles Hospital Erasme, 1070 Anderlecht, Belgium
7. Department of Radiology, University of Texas, MD Anderson Center, Houston, TX 77030, USA
8. Department of Neurology, Johns Hopkins University, Baltimore, MD 21218, USA
9. Division of Neuroradiology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA
10. Department of Radiology, West Virginia University, Morgantown, WV 26506, USA
11. Department of Radiology, Stanford University School of Medicine, Stanford, CA 94063, USA