1. Sobell Department of Motor Neuroscience and Movement Disorders, UCL Institute of Neurology; Queen Square; London UK
2. Department of Neurology; University Hospital Heidelberg; Germany
3. Neuroimmunology Group, Nuffield Department of Clinical Neurosciences; John Radcliffe Hospital; Oxford UK
4. Center for Neurology and Hertie Institute for Clinical Brain Research; Eberhard Karls-University; Tübingen Germany
5. Department of Molecular Neuroscience, UCL Institute of Neurology; Queen Square; London UK
6. Department of Clinical Neurosciences; University of Calgary; Canada
7. Neurology Unit, Department of Clinical and Experimental Medicine; University of Pisa
8. Department of Neurology and Psychiatry, Sapienza; University of Rome; Rome Italy
9. Department of Neurology; University Medical Center, Hamburg-Eppendorf (UKE); Hamburg Germany