High (mRNA levels ≥ 10) and low (mRNA levels > 0.0 and < 2.0) FGF19 expression levels were found in 14.3% (9/63) and 12.7% (8/63) of HCC models, respectively (Fig. 1a, b; Supplementary Fig. 1a, b). The gene discussed is FGF19; the disease is hepatocellular carcinoma.