[1] Department of Clinical Neurology,
[2] University of Vienna,undefined
[3] Austria,undefined
[4] Department of Neurology,undefined
[5] University of Muenster,undefined
[6] Albert-Schweitzer-Strasse 33,undefined
[7] 48129 Muenster,undefined
[8] Germany Tel.: +49-2 51-8 34-81 93 Fax: +49-2 51-8 34-81 81 e-mail: happes@uni-muenster.de,undefined