Therapeutic decisions are taken by the Referring Rheumatologist. He/she will have DAS28 + US results in the group US follow-up or DAS28 + ACR/EULAR remission criteria results in the group ACR/EULAR follow-up. Therapeutic recommendations (therapeutic options, according to the randomization group, a threshold of activity will be decided by a scientific committee for increasing, stop or change therapy) will be given according to the group of randomization and based on the level of inflammation. The Referring Rheumatologist, will be free to follow or not the therapeutic advices.