Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
B*4204 variantAH0136469606HLA-B   
B*4204 variantAY5048099606HLA-B   
B*4204 variantAY5048109606HLA-B   

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

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Text2Knowledge ... Yong Huang 2002