Apoptotic assay of H358 cells treated for 48 h with vehicle, AZD4547 (5 µM) and BI2536 (5 nM), in the presence or absence of Q-VD-OPh (20 µM). Data shown as mean ± SD (n=3). ***P<0.001 and ****P<0.0001 by two-way ANOVA with Tukey's multiple comparisons test. 