Figure 1  Boxplot of immunoglobulin G (IgG) concentrations from plasma of 100 controls (10.9 mg mL−1 ± 0.33) compared to 100 lung cancer cases (14.1 mg mL−1 ± 0.47). IgG concentrations of cases and controls are significantly different (unpaired t-test, p < 0.0001). Significance is indicated by asterisks (*** for p-value <0.001).
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