HLA-DRB1 and myeloid sarcoma: Nevertheless, all four of the HLA-DRB1*15:01~ HLA-DQB1*06:02~a1 containing haplotypes (c2, c3, c6, and c11) were significantly associated with MS and had ORs [single copy] ranging from 2.5 to 3.9, with the largest being for (c11) and the smallest being for (c2).