HLA-DRB1 and myeloid sarcoma: Furthermore, HLA-A*02 allele was a protective factor against MS (p  =  0.001; OR  =  0.671; 95% CI  =  0.529 - 0.851) while HLA-DRB1*15 allele was a risk factor (p < 0.001; OR  =  2.525; 95% CI  =  1.801 - 3.754) (data not shown), as already reported in the Italian population too [3], [32], [33], [34], [35].