HLA-DRB1 and classic Hodgkin lymphoma: Meta-analysis confirmed previously observed associations of HLA-DRB1*04 and HLA-DRB1*07 for cHL overall, HLA-B*07, HLA-DRB1*15/16, and HLA-DRB1*11/12 for EBV− cHL, and five known associations, i.e., HLA-A*01, HLA-A*02, HLA-B*08, HLA-B*37, and HLA-DRB1*03, for EBV+ cHL (Table 2 and Supplementary Figure S1).