For instance, CYP1A2 is the molecular target in dihydralazine-induced hepatitis and AIH as a component of APECED, CYP2D6 in AIH-2 and in some patients with HCV infection, CYP2A6 in APECED and in a proportion of patients with HCV infection and UGT1 in some cases of AIH-2 and chronic hepatitis D or C. This evidence concerns the gene CYP2A6 and hepatitis A virus infection.