1 Barlo MS Centre, Division of Neurology, Department of Medicine, St. Michael's Hospital, Toronto, Ontario, Canada.
2 University of British Columbia, Vancouver, British Columbia, Canada.
3 Faculty of Medicine, Division of Neurology, University of British Columbia, Vancouver, British Columbia, Canada.
4 University of Calgary, Hotchkiss Brain Institute, Calgary, Alberta, Canada.
5 Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada.
6 Office of the Saskatchewan Multiple Sclerosis Clinical Research Chair, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
7 London Health Sciences Centre, London, Ontario, Canada.
8 University of Ottawa Department of Medicine, and the Ottawa Hospital Research Institute, Ottawa, Ontario, Canada.
9 Montreal Neurological Institute and Hospital, Montreal, Québec, Canada.
10 CHU de Québec (Université Laval) & CIUSSS Capitale-Nationale - IRDPQ, Quebec City, Québec, Canada.
11 Faculty of Medicine & Dentistry, University of Alberta, Edmonton, Alberta, Canada.
12 Memorial University, St. John's, Newfoundland and Labrador, Canada.