1. Kiel University,Chair of Microwave Engineering,Kiel,Germany,24143
2. Institute of Clinical Neuroscience, Heinrich Heine University Düsseldorf,Medical Faculty,Düsseldorf,Germany,40225
3. University Hospital Schleswig-Holstein,Department of Neurology,Kiel,Germany,24105
4. University Hospital Schleswig-Holstein,Department of Neurosurgery,Kiel,Germany,24105