Toll-like receptor (TLR)2 expression on alveolar macrophages (AMs). TLR2 expression in group 1 (n = 29) did not differ before and after surgery (P = 0.32). In group 2 (n = 3) the TLR2 expression was lower by trend after surgery not possible to calculate P value with 3 patients (as in Figure 1 and 3). Comparing both groups, group 2 showed a significantly lower baseline of TLR2 expression (P = 0.027) and a tendency of lower postoperative values (P = 0.21). Box plots represent median and IQR; blue, values before surgery; green, values after surgery. The Wilcoxon test was used for dependent groups and the Mann–Whitney U-Test for independent groups; *P <0.05.