Given the low frequency of homozygotes for the mutated allele val/val of GSTP1, all GSTP1 cases were considered as one group Including individuals with the homozygote allele val/val and the heterozygote allele ile/val.
Para GSTP1, dada la baja frecuencia de homocigotos para el alelo mutado val/val, se consideraron como un solo grupo los individuos que portan el alelo val en estado homocigoto val/val o heterocigoto ile/val.