HLA-DPB1 and primary biliary cholangitis: Our detected association at HLA-DPB1*03:01 is consistent with results from HLA imputation in a medium-sized Italian PBC data set (676 cases and 1440 controls) in which Invernizzi et al. [22] used the Beagle software [23], in conjunction with the T1DGC HLA reference set, to demonstrate association of HLA-DPB1*03:01 with disease [22].