Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
NKX2.8BC0410909606Nkx2-9    NKX2H    NKX2-8    603245
NKX2.8NM_0143609606NKX2H    Nkx2-9    NKX2-8    603245
NKX2.8Y106559031

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

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Text2Knowledge ... Yong Huang 2002