Among the patients phenotyped for these biomarkers, we identified 54,649 individuals with the CC genotype, 44,178 with the CT genotype, and 9,192 with the TT genotype for the rs7903146 variant in TCF7L2, the strongest GWAS signal for type 2 diabetes [1]. This evidence concerns the gene TCF7L2 and type 2 diabetes mellitus.