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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. Arthritis Res Ther. 2010;12(3):R76. doi: 10.1186/ar2995. Epub 2010 May 5. Arthritis Res Ther. 2010. PMID: 20444271 Free PMC article.
A randomized trial of the efficacy and tolerability of the COX-2 inhibitor rofecoxib vs ibuprofen in patients with osteoarthritis. Rofecoxib/Ibuprofen Comparator Study Group.
Day R, Morrison B, Luza A, Castaneda O, Strusberg A, Nahir M, Helgetveit KB, Kress B, Daniels B, Bolognese J, Krupa D, Seidenberg B, Ehrich E. Day R, et al. Among authors: helgetveit kb. Arch Intern Med. 2000 Jun 26;160(12):1781-7. doi: 10.1001/archinte.160.12.1781. Arch Intern Med. 2000. PMID: 10871971 Clinical Trial.
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