A sentinel SNP for each region was selected for genotyping from previously reported GWAS (1 (link)–17 (link)). Two SNPs were selected for KCNQ1 and CDC123, where two distinct sets of variants have been described. In addition, 45 ancestry-informative markers (24 (link)) were genotyped for estimation of the individual proportion of European heritage (25 (link)). Genotyping was conducted by the SNPplex method (Life Technologies, Carlsbad, CA) or the BeadXpress system (Illumina, San Diego, CA) according to the manufacturer’s instructions. Results for 18 SNPs were reported previously (20 (link),26 (link)–29 (link)). They are included here for a more complete characterization of the effects of established T2DM loci.