1. Movement Disorders Section, Neuroscience Department; Raul Carrea Institute for Neurological Research (FLENI); Buenos Aires Argentina
2. Sobell Department of Motor Neuroscience and Movement Disorders UCL Institute of Neurology, Queen Square; London WC1N3BG UK
3. Department of Neurology; University Hospital; Heidelberg Germany
4. Neuroimmunology Group, Nuffield Department of Clinical Neurosciences; John Radcliffe Hospital; Oxford UK
5. Argentine National Scientific and Technological Research Council (CONICET)