Fig. 6

Number of macrophages (a) and lymphocytes (b) in bronchoalveolar lavage fluid 1, 3, 28 days and 3 months after exposure to GaP NWs, carbon black Printex 90 (CB) or MWCNT Mitsui-7. Dot plot with mean ± standard error of the mean. Sample sizes are listed in the legend of Fig. 5. Statistical significance compared to controls *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001