Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
CDW40BC0124199606Bp50    CD40    p50    MGC9013    TNFRSF5   
CDW40BC0645189606Bp50    CD40    p50    MGC9013    TNFRSF5   
CDW40NM_0012509606p50    Bp50    CD40    MGC9013    TNFRSF5   
CDW40NM_1528549606p50    Bp50    CD40    MGC9013    TNFRSF5   

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

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Text2Knowledge ... Yong Huang 2002