title: RAID: a valid tool to quantify the impact of rheumatoid arthritis. But what impact will it have on the core set for trials?
authors.forename: Maarten
authors.initials: M
authors.lastname: Boers
mesh_terms: D001172:Arthritis, Rheumatoid / Q000534:rehabilitation*; D001294:Attitude to Health; D002986:Clinical Trials as Topic; D006305:Health Status Indicators; D006801:Humans; D015203:Reproducibility of Results; D016896:Treatment Outcome