Your Query returns 7 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Madr2NM_01075410090Smad2    Madh2   
MADR2BC0148409606JV18    JV18-1    SMAD2    MADH2   
MADR2BC0256999606JV18    JV18-1    SMAD2    MADH2   
MADR2NM_0059019606JV18    SMAD2    JV18-1    MADH2   
Madr2BC02134210090Smad2    Madh2   
MADR2U650199606
Madr2AF00574310090

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

Google

Text2Knowledge ... Yong Huang 2002