1 Charité-Universitätsmedizin Berlin (F.P.), Freie Universität Berlin and Humboldt-Universität zu Berlin and Berlin Institute of Health, NeuroCure Clinical Research Center, Berlin; Experimental and Clinical Research Center (F.P.), Max Delbrueck Center for Molecular Medicine, Charité-Universitätsmedizin Berlin; and Department of Neuroradiology (M.P.W.), Hannover Medical School, Germany. friedemann.paul@charite.de.
2 Charité-Universitätsmedizin Berlin (F.P.), Freie Universität Berlin and Humboldt-Universität zu Berlin and Berlin Institute of Health, NeuroCure Clinical Research Center, Berlin; Experimental and Clinical Research Center (F.P.), Max Delbrueck Center for Molecular Medicine, Charité-Universitätsmedizin Berlin; and Department of Neuroradiology (M.P.W.), Hannover Medical School, Germany.