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10 kDa interferon (IFN)-γ-induced protein (IP-10) and monokine induced by IFN-γ (MIG) levels among borderline QuantiFERON-TB Gold Plus (QFT) samples. IP-10 and MIG levels of all 87 patients with a borderline QFT result. Dashed lines represent the optimal cut-offs (Youden index) derived from receiver operating characteristic curves (supplementary figure S3). All data were log2-transformed prior to analysis. Includes all data.
