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Correlation study of the anti-Sm antibody assays under investigation. The results obtained from the comparative study of different anti-Sm antibody tests were used for correlation plots showing significant differences in the degree of correlation. The correlation coefficient varied between 0.48 (QuantaLite Sm versus Varelisa Sm antibodies) and 0.94 (Euroimmun Sm versus QuantaLite Sm). All correlation coefficients are summarized in panel g.
