RT Journal Article SR Electronic T1 Methotrexate reduces withdrawal rates of TNF inhibitors due to ineffectiveness in rheumatoid arthritis but only in patients who are seropositive JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 1516 OP 1517 DO 10.1136/annrheumdis-2020-217725 VO 79 IS 11 A1 Greenwood, Mandy A1 Shipa, Muhammad A1 Yeoh, Su-Ann A1 Roussou, Euthalia A1 Mukerjee, Dev A1 Ehrenstein, Michael R YR 2020 UL http://ard.bmj.com/content/79/11/1516.abstract AB