Your Query returns 13 Accession Numbers:
Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
HLA-B*3503AH0127359606HLA-B   
HLA-B*3503AY2503269606HLA-B   
HLA-B*3503AY2503279606HLA-B   
HLA-B*3503AY2503289606HLA-B   
HLA-B*3503AY2503299606HLA-B   
HLA-B*3503AY2503309606HLA-B   
HLA-B*3503AY2503319606HLA-B   
HLA-B*3503AY2503329606HLA-B   
HLA-B*3503AY2503339606HLA-B   
HLA-B*3503AJ4958819606
HLA-B*3503AJ4959359606
HLA-B*3503AJ4959899606
HLA-B*3503AJ5498959606

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

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Text2Knowledge ... Yong Huang 2002