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Funnel plot corresponding to the random-effects meta-analysis of the relationship between BMI and rheumatoid arthritis risk. (a) Funnel plot corresponding to the dose-response meta-analysis of the relationship between BMI and rheumatoid arthritis risk (PEgger's test = 0.334); (b) overweight and rheumatoid arthritis risk (PEgger's test= 0.110); and (c) obesity and rheumatoid arthritis risk (PEgger's test= 0.781). BMI, body mass index.
