ABCB6 and hepatocellular carcinoma: Diagnostic scores were identified as follows: logit (P = HCC) = − 15.2439 + (− 0.0327 × ABCB6 expression level) + (8.0880 × FLVCR1 expression level) + (3.1229 × SLC48A1 expression level) + (0.1703 × SLC7A11 expression level).