基于外周血EGFR突变检测临床意义的深度思考xx大学临床肿瘤学院xx肿瘤医院IPASSStudy:Progression-freesurvivalbyEGFRmutationtype(ITTpopulation)Post-hocCoxanalysiswithcovariatesp-valuesnotcalculatedduetosmallpatientnumbersExon19deletionL858RTimefromrandomization(months)HR(95%CI)=0.377(0.255,0.560)No.eventsgefitinib,46(69.7%)No.eventsC/P...