1. Division of Neurology and Research Centre, Centre hospitalier de l'Université de Montréal (CHUM), and Department of Neurosciences, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada
2. Department of Rheumatic and Immunologic Diseases, Cleveland Clinic, Cleveland, OH, USA
3. Department of Neurology, Hospital de Santa Maria, University of Lisbon, Lisbon, Portugal
4. Department of Neurology, Helsinki University Hospital, Helsinki, Finland
5. Department of Mathematics and Statistics, Université, de Montréal, Montreal, Quebec, Canada
6. Kubik Laboratory for Neuropathology, Massachusetts General Hospital, Boston, MA, USA
7. Division of Neurology, Massachusetts General Hospital, Boston, MA, USA
8. Division of Rheumatology, Azienda Ospedaliera ASMN, Istituto di Ricovero e Cura a Carattere Scientifico, Reggio Emilia, Italy
9. Department of Radiology and Research Centre, CHUM; and Faculty of Medicine, Université, de Montréal, Montreal, Quebec, Canada