Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Pebp2NM_02230910090PEA2    PEBP2b    Pebpb2    Cbfb   
Pebp2BC02674910090PEA2    PEBP2b    Cbfb   
Pebp2BC04075210090PEA2    PEBP2b    Cbfb   
Pebp2BC00676310090PEA2    PEBP2b    Cbfb   

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

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Text2Knowledge ... Yong Huang 2002