LINC01503 and hepatocellular carcinoma: LINC01503 is involved in a variety of malignancies, including hepatocellular carcinoma, cholangio-carcinoma, non-small-cell lung cancer, cervical cancer, and gastric cancer (Qu et al., 2019; Shen et al., 2020; Wang et al., 2020; Zhang et al., 2020; Feng et al., 2021; Ma et al., 2021).