Your Query returns 12 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
madh5BC0504817955mad    SBN    fb67b04    wu:fb67b04   
madh5NM_1313687955SBN    mad    cb400    smad5    fb67b04    sb:cb400    wu:fb67b04   
Madh5NW_04748710116
MADH5BC0096829606JV5-1    SMAD5    603110
MADH5NM_0059039606JV5-1    SMAD5    603110
Madh5NT_03958610090603110
Madh5BC05000110090Dwf-C    Smad5    MusMLP    603110
madh5BC0656447955mad    SBN    fb67b04    wu:fb67b04    sb:cb400    cb400   
MADH5NT_0347729606603110
Madh5NM_00854110090Dwf-C    Smad5    MusMLP    1110051M15Rik    603110
Madh5NM_02169210116
Madh5BC04823310090Dwf-C    Smad5    MusMLP    603110

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

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Text2Knowledge ... Yong Huang 2002