STAT3 and lung cancer: Published data have shown a clear link between the IL‐11/IL‐11RA axis and a hyperactivation of STAT3 signalling leading to anti‐apoptotic, proangiogenic, migration and aggressiveness for gastric,29, 30 colorectal,31, 32 endometrium,33 breast,17 glioblastoma34 and lung cancer.20