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Aranda E, Carrato A, Cervantes A, Sastre J, Gómez MA, Abad A, Masutti B, Ribera F, Marcuello E, Pronk L, Balcells M, Díaz-Rubio E; Grupo Español de Traitamiento de Tumores Digestivos.Aranda E, et al. Among authors: ribera f.Ann Oncol. 2004 Apr;15(4):559-67. doi: 10.1093/annonc/mdh158.Ann Oncol. 2004.PMID: 15033659Free article.Clinical Trial.