MAS1 and type 2 diabetes mellitus: Of the two MAS1 and 12 IGF2R SNPs that were significantly associated with C4 membership, IGF2R rs68168937 T was associated with a decreased likelihood of being prescribed T2D medication, IGF2R rs3777420 G, MAS1 rs220721 T, MAS1 rs170219 G were associated with being prescribed fewer unique T2D medications, and MAS1 rs220721 T was associated with decreased likelihood of being prescribed sulfonylureas (Fig. 2B).