1. Department of Radiology; University of Minnesota; Minneapolis Minnesota USA
2. National Institute of Neurological Disorders and Stroke, NIH; Bethesda Maryland USA
3. American College of Radiology Imaging Network (ACRIN); Philadelphia Pennsylvania USA
4. Center for Statistical Sciences; Brown University; Providence Rhode Island USA
5. Department of Radiology; University of Chicago; Chicago Illinois USA
6. Department of Radiology; Hospital of the University of Pennsylvania; Philadelphia Pennsylvania USA
7. Department of Radiology; Medical College of South Carolina; Charleston South Carolina USA
8. Department of Radiology; University of Texas Southwestern Medical Center; Dallas Texas USA
9. Department of Radiology; Memorial Sloan-Kettering Cancer Center; New York New York USA
10. Department of Radiology; Massachusetts General Hospital; Boston Massachusetts USA
11. Masonic Cancer Center and Department of Medicine; University of Minnesota; Minneapolis Minnesota USA
12. Washington Radiology Associates, P.C.; Fairfax Virginia USA
13. Department of Surgery; University of California; San Francisco California USA
14. Department of Radiology; University of California; San Francisco California USA
15. Department of Radiology; University of Washington; Seattle Washington USA