HOTAIR and lung cancer: Studies have indicated that lncRNAs play critical roles in lung cancer development and progression by altering multiple signalling pathways, and some cancer‐associated lncRNAs have been identified, such as H19,8 MALAT(lung adenocarcinoma associated transcript 1),9, 10 MIR31HG,11 HOTAIR,12 DGCR5,13 AFAP1‐AS1,14 SNHG1 and RMRP.15 However, the research on the identification of additional lung cancer‐associated lncRNAs remains to be investigated.