Your Query returns 9 Accession Numbers:
Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
HLA-B*520101AH0127509606HLA-B   
HLA-B*520101AY2504469606HLA-B   
HLA-B*520101AY2504479606HLA-B   
HLA-B*520101AY2504489606HLA-B   
HLA-B*520101AY2504499606HLA-B   
HLA-B*520101AY2504509606HLA-B   
HLA-B*520101AY2504519606HLA-B   
HLA-B*520101AY2504529606HLA-B   
HLA-B*520101AY2504539606HLA-B   

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

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Text2Knowledge ... Yong Huang 2002