Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Hba-a1NM_00821810090Hba1   
Hba-a1NT_03951510090
Hba-a1NT_03953110090
Hba-a1BC04302010090Hba1   

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

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Text2Knowledge ... Yong Huang 2002