Allele frequencies (at a resolution corresponding to serological specificities) of <i>HLA-A</i> and <i>HLA-DRB1</i> in MS patients (n = 1084) and healthy controls (n = 1347).

aAX includes all observed alleles at the HLA-A locus with frequencies of less than 5% in cases; A*23, A*25, A*26, A*29, A*30, A*31, A*32, A*33, A*66, A*68, A*69, A*74 and A*210. bDRB1X includes all observed alleles at the HLA-DRB1 locus with frequencies of less than 5% in cases;DRB1*07, DRB1*09, DRB1*10, DRB1*11, DRB1*12, DRB1*14, DRB1*16 and DRB1*103.