Your Query returns 5 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
pax-bNM_1311847955noi    paxb    Pax-2    cb378    pax2.1    PAXZF-B    pax[zf-b]    pax2a   
pax-bBC0666907955noi    Pax-2    cb378    PAXZF-B    pax[zf-b]    pax2a   
Pax-BU9619442240
Pax-BU961976148
pax-BAJ2495636096

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

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Text2Knowledge ... Yong Huang 2002