Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
MADR1BC0018789606JV4-1    SMAD1    BSP1    MADH1    601595
Madr1BC05869310090Mlp1    Smad1    MusMLP    Madh1    601595
Madr1NM_00853910090Mlp1    Smad1    MusMLP    Madh1    601595
MADR1NM_0059009606BSP1    JV4-1    SMAD1    DKFZP586M0622    MADH1    601595

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

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Text2Knowledge ... Yong Huang 2002