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a Effect of 24 and 48 h of TGF-β1 stimulation on RPE cell proliferation. **P < 0.01, ***P < 0.001, ****P < 0.0001 versus the OD value of cells cultured without TGF-β1. b Effect of BK on TGF-β1-induced cell proliferation. & P < 0.05, &&& P < 0.001 versus without TGF-β1 and BK. ***P < 0.001 versus TGF-β1 without BK. c Effect of HOE-140 on the inhibitory effects of BK. **P < 0.01, ***P < 0.001 versus without addition, &P < 0.01 versus with TGF-β1 alone, # P < 0.01 versus with TGF-β1 and BK
