The study was amended with modification of inclusion criteria (from wild-type tumor KRAS gene to wild-type RAS gene, including KRAS and NRAS exons 2, 3 and 4)
RAS mutational status of tumors of patients enrolled before amendment 1 approval will be centrally revised. Patients whose tumors will result RAS mutated at the biomarkers central revision, will be replaced. Therefore, the overall sample size at both the stages may be higher than the one initially planned.
