Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
C9orf2BC0350569606H7365    TMEFF1    603421
C9ORF2NM_0036929606H7365    TMEFF1    603421

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

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Text2Knowledge ... Yong Huang 2002