Figure 1.

Annual incidence of rheumatoid arthritis in Rochester, Minnesota. Shown is the annual incidence rate per 100,000 population by sex: 1955 to 1995. Each rate was calculated as a 3-year centered moving average. Reproduced from [9] with permission.

Gabriel and Michaud Arthritis Research & Therapy 2009 11:229   doi:10.1186/ar2669
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