How health-related quality of life assessment should be used in advanced colorectal cancer clinical trials by Bonnetain, F, Borg, C, Adams, R, Ajani, J, Benson, A, Bleiberg, H, Chibaudel, B, Diaz-Rubio, E, Douillard, J, Fuchs, C, Giantonio, B, Goldberg, R, Heinemann, V, Koopman, M, Labianca, R, Larsen, A, Maughan, T, Mitchell, E, Peeters, M, Punt, C, Schmoll, H, Tournigand, C, De Gramont, A