1. Department of Neurology, University of Erlangen-Nuremberg, Erlangen, Germany
2. Department of Neurology, Klinikum Neumarkt, Neumarkt, Germany
3. Department of Neurology, Nuremberg Municipal Academic Hospital, Nuremberg, Germany
4. Department of Neurology, Klinikum Hohe Warte Bayreuth, Bayreuth, Germany