Your Query returns 6 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Il-12aNM_00835110090p35    IL-12p35    Il12a   
IL-12ANM_0008829606CLMF    NFSK    NKSF1    IL12A   
IL-12aU198349530
IL-12aU198419544
IL-12AAY5756159940
IL-12AAY5756169940

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

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Text2Knowledge ... Yong Huang 2002