title: Whither the ACR20?
authors.forename: David T
authors.initials: DT
authors.lastname: Felson
mesh_terms: D018501:Antirheumatic Agents / Q000627:therapeutic use; D001172:Arthritis, Rheumatoid / Q000145:classification* / Q000188:drug therapy / Q000503:physiopathology; D006801:Humans; D012219:Rheumatology / Q000379:methods* / Q000639:trends; D012720:Severity of Illness Index; D016896:Treatment Outcome
chemical_list: D018501:Antirheumatic Agents