title: Lymphocytapheresis in chronic progressive multiple sclerosis: results of a preliminary trial.
mesh_terms: D000328:Adult; D002469:Cell Separation / Q000379:methods*; D006801:Humans; D008214:Lymphocytes / Q000276:immunology*; D008875:Middle Aged; D009103:Multiple Sclerosis / Q000276:immunology / Q000628:therapy*