CBC News: Neurologist cautions people with MS about surgery outside official of clinical studies

An article on CBC News reports Canadians with multiple sclerosis rallied across the country to demand access to a controversial procedure not available in Canada or covered by provincial health insurance policies, and notes that last month in Toronto, Robert Zivadinov, associate professor of neurology, cautioned people with the disease not to rush to seek the surgical procedure to unblock veins unless it was through official clinical studies.