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H2S inhibits the expression of α-SMA, Col-I and Col-III in lung tissues on the 42th day. α-SMA, Col-I and Col-III mRNA were semi-quantified. Results represent mean ± SD of three independent experiments. *** P < 0.001 versus untreated group; ### P < 0.001 versus modle group; ## P < 0.01 versus modle group
