As shown in Supplementary Table S1, one copy of the HLA-DRB1*15:01 allele was associated with almost 4-fold increased odds of MS (OR = 3.77; 95% CI = 2.98–4.76; p < 0.0001) while subjects homozygous for the allele had 17-fold increased odds of developing the disease (OR = 17.01; 95% CI = 7.73–37.39; p < 0.0001). Here, HLA-DRB1 is linked to myeloid sarcoma.