HLA-DRB1 and myeloid sarcoma: The presence of HLA-DRB1*15:01 was significantly associated with MS risk (OR = 1.89; 95% CI: 1.23, 2.91; p = 0.0038), as was the absence of HLA-A*02:01 (OR = 1.62; 95% CI: 1.07, 2.44; p = 0.023).