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To assess incidence and mortality effects of extraarticular rheumatoid arthritis (ExRA) in patients with incident RA in 1995-2007 compared to 1985-1994, in Olmsted County, Minnesota, USA.

Incidence of Extraarticular Rheumatoid Arthritis in Olmsted County, Minnesota, in 1995–2007 Versus 1985–1994: A Population-based Study