Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
MGC12802BC0063389606B4    CD19   
MGC12802NM_0017709606B4    CD19   

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

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Text2Knowledge ... Yong Huang 2002