GRB10 and Silver-Russell syndrome: In contrast, although frequent SNPs were found in exons 3 and 12, and intron 3, as well as a heterozygous microsatellite repeat in intron 14 of the GRB10 gene of SRS patients, no other alterations have been detected, further suggesting to those authors that this gene does not play a major role in the etiology of SRS [48].