1. Department of Neuroscience; University of Copenhagen; Copenhagen Denmark
2. Elsass Institute; Charlottenlund Denmark
3. Sobell Department of Motor Neuroscience & Movement Disorders, Institute of Neurology, University College London & Department of Clinical Neurology; National Hospital for Neurology and Neurosurgery; London UK
4. Department of sensory-motor interaction; Aalborg university; Aalborg Denmark