Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
nk2.2NM_13142279555090    nkx2-2    id:ibd5090    nkx2.2   
nk2.2AB0913888090
nk2.2X859777955

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

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Text2Knowledge ... Yong Huang 2002