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. 2005 Mar 15;92(6):1026–1032. doi: 10.1038/sj.bjc.6602466

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Copyright © 2005 Cancer Research UK

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Comparison in survival between patients having one or two favourable prognostic factors (Group 1/2) and three or four favourable factors (Group 3/4). Survival of patients in Group 3/4 and Group 1/2 is shown as a solid black or solid grey line, respectively. Patients in Group 3/4 had significantly better survival compared with patients in Group 1/2 (P<0.001, log rank).