title: Major infection during methotrexate treatment for rheumatoid arthritis.
authors.forename: A
authors.initials: A
authors.lastname: Schnabel
authors.forename: C
authors.initials: C
authors.lastname: Burchardi
authors.forename: W L
authors.initials: WL
authors.lastname: Gross
mesh_terms: D018501:Antirheumatic Agents / Q000009:adverse effects*; D001172:Arthritis, Rheumatoid / Q000188:drug therapy* / Q000382:microbiology* / Q000401:mortality; D001424:Bacterial Infections / Q000188:drug therapy* / Q000401:mortality; D006801:Humans; D008727:Methotrexate / Q000009:adverse effects*; D009894:Opportunistic Infections / Q000139:chemically induced* / Q000453:epidemiology; D011446:Prospective Studies
chemical_list: D018501:Antirheumatic Agents; D008727:Methotrexate