Time‐to‐event analyses were then performed considering HLA‐E*01 and IM exposure, as well as other MS‐related HLA alleles (e.g., HLA‐DRB1*15:01 and HLA‐A*02:01) and key confounders such as smoking and childhood body size. Here, HLA-DRB1 is linked to myeloid sarcoma.