SMN1 and autoimmune hepatitis: While anti-SMA and anti-LKM-1 are the more common autoantibodies used to diagnose AIH, there are other antibodies such as anti-soluble liver antigen/liver-pancreas (anti-SLA/LP) antibody, which is the most specific marker for the disease, although its presence is found in both AIH types 1 and 2 [1].