Statistics
All data were normality tested with the Shapiro–Wilk test. Non-parametric statistical analyses were performed for comparison of BW and BAL data. Wilcoxon signed rank test was used for the paired BW and BAL. The measured responses in vitro of A549 and BEAS-2B were analysed with non-parametric statistical analyses with Kruskal–Wallis test, with Dunn’s multiple comparison test. Values of 