Fig. 2

AK4 is positively correlated with HIF-1α expression in NSCLC patients. a Representative IHC images of AK4 and HIF-1α expression scores in serial sections of NSCLC tissues. b Spearman’s rho correlation analysis of the IHC staining results for AK4 and HIF-1α in 100 NSCLC patients. c Overall survival analysis of 100 lung cancer patients stratified according to HIF-1α alone or both AK4 and HIF-1α