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Positive anti-citrullinated protein antibody status and small joint arthritis are consistent predictors of chronic disease in patients with very early arthritis: results from the NOR-VEAC cohort.
Mjaavatten MD, Uhlig T, Haugen AJ, Nygaard H, Sidenvall G, Helgetveit K, Kvien TK. Mjaavatten MD, et al. Among authors: sidenvall g. Arthritis Res Ther. 2009;11(5):R146. doi: 10.1186/ar2820. Epub 2009 Oct 1. Arthritis Res Ther. 2009. PMID: 19796386 Free PMC article.
The likelihood of persistent arthritis increases with the level of anti-citrullinated peptide antibody and immunoglobulin M rheumatoid factor: a longitudinal study of 376 patients with very early undifferentiated arthritis.
Mjaavatten MD, van der Heijde D, Uhlig T, Haugen AJ, Nygaard H, Sidenvall G, Helgetveit K, Kvien TK. Mjaavatten MD, et al. Among authors: sidenvall g. Arthritis Res Ther. 2010;12(3):R76. doi: 10.1186/ar2995. Epub 2010 May 5. Arthritis Res Ther. 2010. PMID: 20444271 Free PMC article.