Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Hox-2.9NM_0021449606HOX2    HOX2I    HOXB1   
Hox-2.9NM_00826610090Hoxb1   
Hox-2.9NM_00826610090Hoxb1   
hox-2.9X5306310090

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

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Text2Knowledge ... Yong Huang 2002