Additional file 3.
Quality assessment lists. For the domain of early rheumatoid arthritis (RA) we used the Quadas-2, with an extra question on sample size. For the studies evaluating remission, no quality assessment tool was available, therefore we created a quality items list to evaluate these studies.
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Ten Cate et al. Arthritis Research & Therapy 2013 15:R4 doi:10.1186/ar4132