Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
CebpNM_00767810090CBF-A    Cebpa    116897
CEBPBC0638749606C/EBP-alpha    CEBPA    116897
CEBPNM_0043649606C/EBP-alpha    CEBPA    116897
CEBPM371979606116897

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

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Text2Knowledge ... Yong Huang 2002