Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
NKX2HBC0410909606NKX2.8    Nkx2-9    NKX2-8    603245
NKX2HNM_0143609606NKX2.8    Nkx2-9    NKX2-8    603245

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

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Text2Knowledge ... Yong Huang 2002