Your Query returns 7 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
DelGEFNM_01378910090Gef    Gnef    Gnefr    606051
DELGEFBC0653759606606051
DelGEFAJ2439509606606051
DelGEFAJ2439519606606051
DELGEFNM_0121399606606051
DelGEFAJ24395210090606051
DELGEFNT_0092379606606051

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

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Text2Knowledge ... Yong Huang 2002