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An administrative data validation study of the accuracy of algorithms for identifying rheumatoid arthritis: the influence of the reference standard on algorithm performance.
Widdifield J, Bombardier C, Bernatsky S, Paterson JM, Green D, Young J, Ivers N, Butt DA, Jaakkimainen RL, Thorne JC, Tu K. Widdifield J, et al. BMC Musculoskelet Disord. 2014 Jun 23;15:216. doi: 10.1186/1471-2474-15-216. BMC Musculoskelet Disord. 2014. PMID: 24956925 Free PMC article.