All patients are treated openly with COMBI, starting with a combination of methotrexate, sulfasalazine, hydroxychloroquine and prednisolone. In addition, the patients are randomized into a) infliximab or b) similar placebo. The COMBI treatment will be continued for 2 years, but the infliximab/placebo will be given only during the first 6 months. After 2 years, if the patient is in remission, the prednisolone will be gradually tapered off. If the patient is still in remission, the conventional DMARDs can be sequentially tapered down. If the remission is lost, the last DMARD is reinstituted. If the patient is not in remission of COMBI, after 26 weeks, treatments are free, including the institution of a biological drug.