Affiliation: | (1) Department of Neurology, University Clinic of Essen, Hufelandstrasse 55, D-45122 Essen, Germany e-mail: matthias.maschke@uni-essen.de, Tel.: +49-201-7232461 Fax: +49-201-7235901, DE;(2) Department of Neuroradiology, University Clinic of Essen, Hufelandstrasse 55, D-45122 Essen, Germany, DE |