RT Journal Article SR Electronic A1 Vinall, Maria T1 A Genome-Wide SNP Association Study Identifies Novel Risk Loci for Rheumatoid Arthritis in Swedish EIRA Study JF MD Conference Express YR 2007 FD SAGE Publications VO 7 IS 4 SP 10 OP 10 DO 10.1177/155989770700700403 UL http://mdc.sagepub.com/content/7/4/10.abstract AB Rheumatoid arthritis (RA) affects ∼1% of Western populations. The presence (∼60% of cases) or absence (∼40%) of anti citrullinated protein autoantibodies (ACPA) is a biomarker of disease defining two RA subtypes. This article discusses the Epidemiological Investigation of RA [EIRA] study cohort of Swedish cases and controls.