Your Query returns 5 Accession Numbers:
Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
HER2NM_0044489606NEU    NGL    TKR1    HER-2    ERBB2    164870
HER2BC02708010090Neu    HER-2    c-erbB2    c-neu    Erbb2    164870
HER2BC04681110090Neu    HER-2    c-erbB2    c-neu    Erbb2    164870
HER2BC05307810090Neu    HER-2    c-erbB2    c-neu    Erbb2    164870
her2NM_1310897955HER-2   

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

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Text2Knowledge ... Yong Huang 2002