Fig. 3

The lobe specific deposition fraction of a regular and b mentholated little cigar smoke in male and female rat’s lungs. Bars represent mean ± standard error for each lobe (n = 5). Bars with the different letters indicate significant difference (P < 0.05) between lobes within the same sex of rats according to one-way ANOVA with the Tukey’s HSD test. Statistical analyses on male and female rats’ data were conducted separately and thus the annotated letters should be interpreted separately