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Box and whiskers plots of gene expression in the corneal epithelium of control (CTRL; n = 23), early keratoconus (eKC; n = 22) and advanced keratoconus (aKC; n = 6). Transcript level expressed as mean of delta cycle threshold (dCT) normalized to housekeeping genes. Non-parametric Kruskal-Wallis test. P < 0.05 was considered as statistically significant.*, P value < 0.05.
