1. Department of Neurology, Medical Faculty and University Hospital Duesseldorf, Heinrich-Heine University Duesseldorf, Moorenstr. 5, 40225 Duesseldorf, Germany
2. Department of Cardiology, Pulmonolgy and Vascular Medicine, Medical Faculty and University Hospital Duesseldorf, Heinrich-Heine University Duesseldorf, Moorenstr. 5, 40225 Duesseldorf, Germany
3. Brain and Mind Center, University of Sidney, Sidney NSW 2050, Australia
4. Department of Neurology, Palacky University Olomouc, 77146 Olomouc, Czech Republic