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Receiving-operating characteristics curves for TGFβ1 serum levels. C-statistics validated TGFβ1 serum levels as a predictive biomarker of (A) diabetic patients without sign of DR (diabetic) compared to control healthy subjects; (B) diabetic compared to naïve PDR patients; (C) naïve NPDR compared to naïve PDR patients; (D) NPDR treated with aflibercept (afli) compared to PDR treated (afli) patients.
