Your Query returns 13 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
SMAD4BC0023799606DPC4    JIP    MADH4    600993
SMAD4NM_0053599606JIP    DPC4    MADH4    600993
Smad4AJ00489110090Smad3    600993
Smad4BC04658410090DPC4    Madh4    600993
Smad4NM_01927510116Madh4   
Smad40N/ADPC4    D18Wsu70e    Madh4   
Smad4AY3714846183
Smad4AB0534839823
SMAD4AB0435479606600993
SMAD4AF3641269606600993
Smad4AB01095410116
Smad4AF05600210116
Smad4AY11978810090600993

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

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Text2Knowledge ... Yong Huang 2002