ecrin-mdr-crcClinical2009unresectable metastatic colorectal cancerUnresectable Metastatic Colorectal CancerObservationalhttps://newmdr.ecrin.org/Study/2617422Japan3ECRIN MDRCompletedfalseEvaluating amphiregulin in plasma for metastatic colorectal cancer treated with cetuximab based therapyPrimary outcome(s): disease control rate between higher and lower amphiregulin group2009-03-152617422JPRN-UMIN000001934