HLA-DRB1 and myeloid sarcoma: We then conducted a multivariate regression analysis incorporating the four associated HLA alleles (HLA-DRB1*15:01, HLA-DRB1*04:05, HLA-B*39:01, and HLA-B*15:01) and found that all the HLA alleles were independently associated with MS (HLA-DRB1*15:01 for P = 5.7 × 10−6 and OR = 4.06, HLA-DRB1*04:05 for P = 1.2 × 10−4 and OR = 3.02, and HLA-B*39:01 for P = 1.9 × 10−4 and OR = 4.13, and HLA-B*15:01 for P = 2.3 × 10−4 and OR = 3.10; Table 3).