Your Query returns 7 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
HLA-DRB1*1301AF0174419606HLA-DRB1   
HLA-DRB1*1301U835839606HLA-DR   
HLA-DRB1*1301AJ5381859606
HLA-DRB1*1301AJ5381859606
HLA-DRB1*1301AJ5381859606
HLA-DRB1*1301AF1424439606HLA-DRB1   
HLA-DRB1*1301X655659606

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

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Text2Knowledge ... Yong Huang 2002