CSF2 and neoplasm: In line with these findings, several tumour‐related genes, such as CCL7 and CSF2, used to calculate the malignancy score (Table S5 lists the genes used for calculating the malignancy score) were found to be expressed in the non‐epithelial cells in GC36, 37; this may be the reason 3% of non‐epithelial cells were malignant.