IL12A and primary biliary cholangitis: In addition to the human leukocyte antigen (HLA) locus, more than 60 non-HLA susceptibility regions have been identified in PBC pathogenesis, including tumor necrosis factor superfamily member 15 (TNFSF15), Interleukin 12 A (IL12A), Interleukin 12 receptor (IL12R), Nuclear Factor Kappa B Subunit 1 (NFKB1) and other immune-associated genes6–11.