ACE = angiotensin-converting enzyme, ARB = angiotensin receptor blocker, CHB = chronic hepatitis B, CHC = chronic hepatitis C, CLD = chronic liver disease, CM = contrast medium, DLP = dose-length product, eGFR = estimated glomerular filtration rate, HCC = hepatocellular carcinoma, LC = liver cirrhosis, NASH = non-alcoholic steatohepatitis, NSAID = non-steroidal anti-inflammatory drug. The gene discussed is ACE; the disease is chronic hepatitis C virus infection.