Impact of pre-existing background therapy on placebo responses in randomised controlled clinical trials of rheumatoid arthritis

Citation:

Kerschbaumer A, Rivai ZI, Smolen JS, et al Impact of pre-existing background therapy on placebo responses in randomised controlled clinical trials of rheumatoid arthritis. Annals of the Rheumatic Diseases Published Online First: 20 June 2022. doi: 10.1136/annrheumdis-2021-221807