1. Department of Neurology, UKD and Center for Neurology and Neuropsychiatry, LVR Klinikum, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
2. Department of Neurology, Palacky University Olomouc, Olomouc, Czech Republic
3. Department of Neurology, Royal Prince Alfred Hospital and Brain and Mind Centre, The University of Sydney, Sydney, NSW, Australia