TGFB1 and dry eye syndrome: Next, to confirm the link between the CXCL6‐induced secretion of TGF‐β in KCs and CXCR1/2 and EGFR expression, ELISA was performed on KCs incubated with CXCL6 with or without the CXCR1/2 antagonist SCH527123 or the EGFR antagonist Afatinib for 18 hour (Figure 2D).