title: Viral infections in multiple sclerosis patients on low-dose immunosuppression. A prospective study.
mesh_terms: D002986:Clinical Trials as Topic; D003168:Complement Fixation Tests; D046508:Culture Techniques; D003587:Cytomegalovirus / Q000276:immunology; D006801:Humans; D007108:Immune Tolerance; D007165:Immunosuppression Therapy; D015122:Mercaptopurine / Q000008:administration & dosage / Q000627:therapeutic use*; D008727:Methotrexate / Q000008:administration & dosage / Q000627:therapeutic use*; D009103:Multiple Sclerosis / Q000150:complications* / Q000188:drug therapy / Q000276:immunology; D018139:Simplexvirus / Q000302:isolation & purification; D014777:Virus Diseases / Q000209:etiology*
chemical_list: D015122:Mercaptopurine; D008727:Methotrexate