Both mutKRAS ctDNAb and ctDNAf predicts outcome. Kaplan-Meier survival curve for progression-free survival from randomization to maintenance categorized by (A) mutKRAS ctDNAb and (B) ctDNAf. Kaplan-Meier survival curve for overall survival categorized by (C) mutKRAS ctDNAb and (D) ctDNAf .