REVECHO is an international prospective multicentre simple blinded randomized study with a longitudinal follow-up of 18 months and a total study duration of 48 months. During the first visit, after having signed the consent form, Patients undergo at each visit, a clinical evaluation comprising an assessment of tender joint count (TJC), of swollen joint count (SJC), pain assessment, patient global assessment of the activity of disease, as well as a physician global assessment of the disease activity, an ultrasound examination of small and large joints by an independent physician blinded to the clinical data, and to the results of biological exams (blood sampling to assess CRP, complete blood count (CBS), and renal and hepatic functions). The clinical, biological and ultrasound assessments will be performed every 3 months.