Your Query returns 8 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
NefaNM_01677310090Nucb2   
NEFANM_0050139606NUCB2   
NefaBC01045910090Nucb2   
NefaBC06177810116Nucb2   
NefaNM_02166310116p54    Nucb2   
NEFAX767329606
NefaAF25014210116
NEFAAJ22258610090

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

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Text2Knowledge ... Yong Huang 2002