Clinical trials in rheumatoid arthritis under attack: are practice based observational studies the answer?
D T
DT
Felson
D001172:Arthritis, Rheumatoid / Q000628:therapy*; D002986:Clinical Trials as Topic; D006801:Humans; D007256:Information Systems; D011379:Prognosis; D016032:Randomized Controlled Trials as Topic; D012107:Research Design