1 Department of Neurology, University Hospital Marburg, 35043 Marburg, Germany; Department of Psychiatry, University Hospital Marburg, 35043 Marburg, Germany.
2 Department of Neurology, University Hospital Marburg, 35043 Marburg, Germany; Department of Neurology, University Hospital Cologne, Cologne, Germany. Electronic address: lars.timmermann@uk-gm.de.