To understand whether lung cancer cells depend on IL‐11 for tumour progression, we selected two LUAD cell lines (A549, H1975) that express high levels of IL‐11 by ELISA (Figure S1C in the Supporting Information) and disrupted the IL‐11 gene by CRISPR/Cas9 technology (Figure 3A). The gene discussed is IL11; the disease is neoplasm.