FCN2 genotype frequencies (%) in Chagas patients and controls.

In bold: genotypes with −4 A/G heterozygosity, whose summed frequencies differ between cardiac patients and controls. Gray-shadowed: genotypes AGGA/GGAS and GGAS/GGAS (homozygote for A258S), whose summed frequencies differ between cardiodigestive patients and indeterminate patients or controls (see text).*A258S was investigated by sequencing in a subset of 135 controls. n number of individuals.