1. From the Departments of Neuroradiology (M.B., B.F., C.M., S.M., D.H., M.L., C.Z., T.B.-B.), Klinikum rechts der Isar, Technical University of Munich, Germany
2. Radiology (A.S.), Klinikum rechts der Isar, Technical University of Munich, Germany
3. Clinic for Neurology, Helios Dr. Horst Schmidt Kliniken, Wiesbaden, Germany (H.P.)
4. Neurology (L.S.), Klinikum rechts der Isar, Technical University of Munich, Germany
5. Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco (L.S.)
6. Department of Cardiology, Munich University Clinic, Ludwig-Maximilians University, Germany (P.O.)
7. Departments of Neuroradiology (J.K.), Inselspital, University Hospital Bern, University Bern, Switzerland.
8. Neurology (J.K.), Inselspital, University Hospital Bern, University Bern, Switzerland.