1. Department of Neurology, Inselspital, Bern University Hospital, University of Bern, CH 3010 Bern, Switzerland
2. Department of Neurology, University Hospital Zurich, Medical Faculty, University of Zurich, CH 8091 Zurich, Switzerland
3. Karl Landsteiner Institute for Clinical Epilepsy Reserach and Cognitive Neurology, AT 1130 Vienna, Austria