Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
EXTR1BC0063639606KIAA0519    REG    RPR    EXTL3    605744
EXTR1AF0835519606EXTL1L    EXTL3    605744
EXTR1NM_0014409606REG    RPR    KIAA0519    EXTL3    605744
EXTR1AB0070429606605744

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

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Text2Knowledge ... Yong Huang 2002