Your Query returns 6 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
DRB*W1201AF0447219483DRB   
DRB*W1201AJ5441699493
DRB*W1201AJ5441699493
DRB*W1201AJ54416543777
DRB*W1201AJ54416543777
DRB*W1201Z271289468

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

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Text2Knowledge ... Yong Huang 2002