title: Failure to isolate a transmissible agent from the bone-marrow of patients with multiple sclerosis.
mesh_terms: D000818:Animals; D001853:Bone Marrow / Q000382:microbiology* / Q000473:pathology; D002460:Cell Line; D002478:Cells, Cultured; D003588:Cytopathogenic Effect, Viral; D000882:Haplorhini; D006801:Humans; D009103:Multiple Sclerosis / Q000209:etiology / Q000382:microbiology*; D009174:Mycoplasma / Q000302:isolation & purification