Second, we did not measure markers of hepatitis B and C infectious as well as other liver enzymes such as γ‐glutamyltranspeptidase or common medications that may cause elevated ALT including antibiotics, antiepileptics, nonsteroidal anti‐inflammatory agents, anti‐tuberculosis drugs, anti‐retroviral treatment for HIV, biologic agents such as anti‐tumor necrosis factor drugs, and some cancer chemotherapeutic agents. This evidence concerns the gene GPT and hepatitis B virus infection.