Contrary to a previous work in Sardinian patients with APECED [25], the detection of anti-CYP2A6 autoantibodies in a larger group of Finnish patients was not associated with the presence or absence of hepatitis, while anti-CYP1A2 autoantibodies were detected only in APECED patients with hepatitis [23]. This evidence concerns the gene CYP1A2 and hepatitis A virus infection.