4 Neuroradiology, University of Essen, Essen, Germany.
5 Swiss Society of Neuroradiology, Basel, Switzerland. karl-olof.lovblad@hcuge.ch.
6 Division of Diagnostic and Interventional Neuroradiology, Geneva University Hospitals, 4 rue Gabrielle-Perret Gentil, 1211, Geneva, Switzerland. karl-olof.lovblad@hcuge.ch.
7 IMK, Basel, Switzerland.
8 Swiss Federation of Clinical Neurosciences, Basel, Switzerland.
9 Division of Neurology, Inselspital, University of Bern, Bern, Switzerland.
10 Division of Neuroradiology, Kantonsspital Aarau, Aarau, Switzerland.
11 Swiss Federation of Clinical Neurosciences (SFCNS), Basel, Switzerland.