HLA-DRB1 and acquired polycythemia vera: Yan and coworkers reported in a meta-analysis that HLA-DRB1*04, HLA-DRB1*14, and HLA-DRB1*08 HLA are statistically important susceptibility factors for PV, while in the Jewish population, an association between PV and HLA-DRB1*04:02, and DQB1*03:02 has been reported (148, 149).