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Protein levels of VEGF and IL-1β. (A) VEGF and (B) IL-1β protein levels were measured in the retina of rats in the different experimental groups using ELISA (n=8 rats/group). ##P<0.01 vs. Ctrl; *P<0.05, **P<0.01 vs. DM. Ctrl, untreated control rats; DM, untreated diabetic rats; VEGF, vascular endothelial growth factor; IL, interleukin.
