Fig. 4From: The protective effect of hydrogen sulfide on systemic sclerosis associated skin and lung fibrosis in mice modelChanges in the plasma H2S concentrations. Compared to the control group, the plasma H2S concentrations for mice in the model group at different time points all decreased. Results represent mean ± SD of three independent experiments. * P < 0.05 versus untreated group; ** P < 0.01 versus untreated groupBack to article page