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Serum levels of CXCL5 and the ROC curve in melanoma. The ROC curve was used to calculate cut-offs for CXCL5 serum levels and the AUC. Cut-offs were determined to distinguish responders from non-responders using Youden's index (A). Mean serum levels of CXCL5 in responders (n = 16) and non-responders (n = 30) at day 0 (B). *p < 0.05 (n.s, not significant).
