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Rheumatoid Vasculitis Prevalence Among Veterans with RA 1997-2006. Circles reflect the annual prevalence of rheumatoid vasculitis as a proportion of all inpatients with rheumatoid arthritis and triangles represent prevalence of rheumatoid vasculitis among outpatients for comparable years 1997-2006. A simultaneous drop emerged between 2000 and 2001 in both settings.
