Hokstad, Ingrid Tumor necrosis factor inhibitors are associated with reduced complement activation in spondylarthropathies: An observational study. [electronic resource] - PloS one 2019 - e0220079 p. digital Publication Type: Controlled Clinical Trial; Journal Article; Observational Study; Research Support, Non-U.S. Gov't ISSN: 1932-6203 Standard No.: 10.1371/journal.pone.0220079 doi Subjects--Topical Terms: AdultComplement Activation--drug effectsComplement Membrane Attack Complex--immunologyFemaleHumansMaleMethotrexate--administration & dosageMiddle AgedSpondylarthropathies--bloodTumor Necrosis Factor Inhibitors--administration & dosage