Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Z-151BC0659677955hoxb2a   
Z-151NM_1311167955hoxb2    hoxb2a   

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

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Text2Knowledge ... Yong Huang 2002