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Predictive accuracy of circulating biomarkers to discriminate between patients with SSc and HCs. (a) Logistic ROC curves of individual proteins. (b) Logistic ROC curve of the multi-protein (CXCL10, TNF, CXCL9, CX3CL1) panel. ROC, receiver operating characteristic; ROC-AUC, the area under the ROC curve.
