Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
HLA-DRB1*04 variantAF3048669606HLA-DRB1   
HLA-DRB1*04 variantAY0075659606HLA-DRB1   

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* OMIM link based on symbol match for human and mouse.

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Text2Knowledge ... Yong Huang 2002