HLA-DRB1 and narcolepsy: In another study, it was revealed that the MS-associated haplotype and narcolepsy could thus be specified as DRB1*1501, DRB5*0101, DQA1*0102, DQB1*0602; also the association to DRB5*0101 was as strong as the association to the DRB1*1501 allele.16