Fig. 1From: Comparison of the impact of Tripterygium wilfordii Hook F and Methotrexate treatment on radiological progression in active rheumatoid arthritis: 2-year follow up of a randomized, non-blinded, controlled studyStudy design and numbers of patients in each group who completed or withdrew from the 24-week TRIFRA study and 2-year follow up. RA, rheumatoid arthritis; MTX, methotrexate; TwHF, Tripterygium wilfordii Hook FBack to article page