Your Query returns 7 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Phox2NM_00998610090CDP    Cux    Cux1    Cux-1    Cutl1   
Phox2NM_00888710090Arix    Pmx2    Pmx2a    Phox2a   
Phox2BC05437010090Cux    CDP    Cux-1    Cux1    Cutl1   
Phox2BC01428910090Cux    CDP    Cux-1    Cux1    Cutl1   
Phox2NM_19860210090CDP    Cux    Cux1    Cux-1    Cutl1   
Phox2Z492629031
Phox2X7501410090

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

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Text2Knowledge ... Yong Huang 2002