Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Grb3-3NM_0020869606ASH    EGFRBP-GRB2    GRB2   
Grb3-3NM_2035069606ASH    EGFRBP-GRB2    GRB2   
grb3-3D8574810090

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

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Text2Knowledge ... Yong Huang 2002