1. Double-masked trial of azathioprine in multiple sclerosis. British and Dutch Multiple Sclerosis Azathioprine Trial Group;Lancet,1988
2. The Canadian cooperative trial of cyclophosphamide and plasma exchange in progressive multiple sclerosis. The Canadian Cooperative Multiple Sclerosis Study Group;Lancet,1991
3. The use of immunosuppressive agents in the treatment of multiple sclerosis: a critical review;Goodin;Neurology,1991
4. A placebo-controlled trial of oral cladribine for relapsing multiple sclerosis;Giovannoni;N Engl J Med,2010
5. Immunosuppression with mitoxantrone in multiple sclerosis: a pilot study for 2 years in 22 patients (P573);Gonsette;Neurology,1990