title: A possible epidemiological association between multiple sclerosis and lymphoma/leukaemia.
mesh_terms: D004739:England; D005260:Female; D006801:Humans; D007938:Leukemia / Q000453:epidemiology*; D008223:Lymphoma / Q000453:epidemiology*; D008297:Male; D009103:Multiple Sclerosis / Q000453:epidemiology*