The BALF levels of MDA (a), CAT (b), SOD (c) and thiol (d) in control, COPD, COPD groups-treated with 4 and 8 ml/kg camel milk (CM) and dexamethasone (Dexa), (n = 7). Data are presented as mean ± SEM. ∗∗∗P < 0.001; compared to the control group. +P < 0.05, ++P < 0.01 and +++P < 0.001; compared to untreated COPD group. £P < 0.05, ££P < 0.01 and £££P < 0.001; compared to COPD group-treated with 4 ml/kg CM. #P < 0.05 and ##P < 0.01; compared to Dexa group. Statistical analyses were performed using one-way analysis of variance (ANOVA) with Tukey-Kramer's post-test.