HLA-DQB2 and classic Hodgkin lymphoma: Eleven of the SNP / HLA allele associations, i.e. HLA-B7, HLA-B8, HLA-C7, HLA-DR1, HLA-DR3, HLA-DR4, HLA-DR8, DQB1, DQB2 and DQB4 were not significantly associated with cHL in the HLA allele frequency analysis in this study.