HGF and lung cancer: Zhang et al. (2019) reported that human colorectal cancer-derived CAFs stimulated adhesion of colorectal cancer cells to endothelial cells via releasing hepatocyte growth factor (HGF). Our previous studies also showed that CAFs facilitate metastasis and chemoresistance of lung cancer cells through IL-6 and ANXA3 secretion (Wang et al., 2017; Wang et al., 2019).