Comparison of survival, palliation, and quality of life with three chemotherapy regimen in metastatic colorectal cancer: a multicenter randomised trial. - Maughan,T.S.; James,R.D.; Kerr,D.J.; Ledermann,J.A.; McArdle,C.; Seymour,M.T.; Cohen,D.; Hopwood,P.; Johnston,C.; Stephens,R.J. (Lancet, 2002)