The diplotype and allele frequencies of the cytochromes CYP2C8, CYP2C9, and CYP2C19, as well as the “activity score”, are summarized in Table S1, as well as the allelic and genotypic frequencies and activity score distribution by CYP2C8, CYP2C9, and CYP2C19 within a sample of Ecuadorian T2DM patients (n = 297). The gene discussed is CYP2C19; the disease is type 2 diabetes mellitus.