Additional file 2: Table S2.
Number of positive anti-citrullinated peptide autoantibodies in preclinical RA cases and their matched controls by time prior to RA onset (< 5 years, 5–10 years, ≥10 years) NHS and NHSII.
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Arkema et al. Arthritis Research & Therapy 2013 15:R159 doi:10.1186/ar4342