CALGB 80203 was activated on December 15, 2003. In February 2004, based on the results of the randomized trial of IFL +/- cetuximab showing a significant improvement in overall survival with cetuximab, cetuximab was approved by the FDA for use as front-line therapy for patients with metastatic colon cancer. In response to this action, the Data Safety and Monitoring Board recommended closure of CALGB 80203. CALGB 80203 was subsequently closed to accrual in January 2005 with 238 of the originally targeted 2200 patients enrolled. A final decision was to "replace" CALGB 80203 with a three-treatment arm randomized trial of chemotherapy (FOLFOX or FOLFIRI) with and without cetuximab and/or bevacizumab. The protocol was amended to allow analysis of the data from CALGB 80203 as a randomized phase II trial and reporting of the results.