1. From the Department of Neuroradiology (T.B.-B., J.F.K., C.Z.), Department of Vascular and Endovascular Surgery (J.P.), and Department of Neurology (L.S., K.N., D.K., H.P.), University Hospital Rechts der Isar, Technical University Munich, Munich, Germany; Department of Pathology, German Research Centre for Environmental Health, Munich, Germany (F.N.); and Department of Statistics, Ludwig-Maximilians-University Munich, Munich, Germany (F.S.).