ecrin-mdr-crcClinical2011Colorectal cancerColorectal CancerObservationalhttps://newmdr.ecrin.org/Study/2621808Japan5ECRIN MDRActive, not recruitingfalseRetrospective study of laparoscopic colorectal surgery for elder patientPrimary outcome(s): morbidity rate mortality rate2011-05-152621808JPRN-UMIN000006376