ecrin-mdr-crcClinical2017Colorectal NeoplasmsColorectal Cancer MetastaticColorectal NeoplasmsColorectal Cancer MetastaticObservational patient registryhttps://newmdr.ecrin.org/Study/22287001CetuximabCTCsMetastatic colorectal cancerCt DNAECRIN MDRNot providedfalseEvaluation of CTCs Combined With Tumor Marker Detection of Efficacy of Chemotherapy in mCRCEvaluation of individual peripheral blood circulating tumor cells combined with tumor marker detection of efficacy of chemotherapy in patients with advanced colorectal cancer: A observational clinical trial2017-01-152228700NCT02948985