@article {van Mulligenannrheumdis-2020-219499, author = {Elise van Mulligen and Annette van der Helm-van Mil and Pascal Hendrik Pieter de Jong}, title = {Methotrexate prolongs TNF inhibitor survival, but only in autoantibody-positive rheumatoid arthritis: a validation study}, elocation-id = {annrheumdis-2020-219499}, year = {2021}, doi = {10.1136/annrheumdis-2020-219499}, publisher = {BMJ Publishing Group Ltd}, issn = {0003-4967}, URL = {https://ard.bmj.com/content/early/2021/01/12/annrheumdis-2020-219499}, eprint = {https://ard.bmj.com/content/early/2021/01/12/annrheumdis-2020-219499.full.pdf}, journal = {Annals of the Rheumatic Diseases} }