Quintiles London Drug Research Unit, London, United Kingdom
A & A Pain Institute of St. Louis, St. Louis, Missouri, United States
Vancouver Health Research Center, Victoria, British Columbia, Canada
Office of Donald H. Berdeaux MD, Great Falls, Montana, United States
Dalhousie MS Research Clinic, Halifax, Nova Scotia, Canada
MS Clinic, UBC Purdy Pavilion, Vancouver, British Columbia, Canada
London Health Sciences Centre / University Hospital, London, Ontario, Canada