STAT4 and primary biliary cholangitis: A subsequent noteworthy GWAS from Japan showed that the IL12A and IL12RB2 loci were not significantly associated with PBC, but rather that the TNFSF15 and POU2AF1 genes constituted novel risk loci in Japanese patients with PBC along with other non-HLA loci, including IL7R, IKZF3, CD80, STAT4, and NFKB1.