The “Selected cohort” (S, 50 MS patients, Supplementary Table 1) included only Swedish female subjects selected for being carriers of the HLA-DRB1*15:01 allele (DR15+/+ or DR15+/−) and non-carriers of the HLA-A*02 allele (A2−/−). This evidence concerns the gene HLA-DRB1 and myeloid sarcoma.