McGlynn et al. [34] recruited 231 patients with HCC and 256 healthy controls to examine the association between gene polymorphisms of GSTP1 and GSTA1 and HCC among Chinese who were considered to have been exposed to high levels of aflatoxin B1, a hepatotoxic mycotoxin induced by fungi of the Aspergillus species. The gene discussed is GSTP1; the disease is hepatocellular carcinoma.