Your Query returns 5 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
HOX2BBC0146519606HOX2    HU-2    Hox-2.2    HOXB6    142961
HOX2BNM_0189529606HOX2    HU-2    Hox-2.2    HOXB6    142961
HOX2BNM_1560369606HOX2    HU-2    Hox-2.2    HOXB6    142961
HOX2BNM_1560379606HOX2    HU-2    Hox-2.2    HOXB6    142961
Hox2bX897614577

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

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Text2Knowledge ... Yong Huang 2002