Your Query returns 1 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Nkx-2.9NM_00870110090Nkx2.9    tinman    Nkx2-9   

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

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Text2Knowledge ... Yong Huang 2002