1. Anonymous: Consensus statement: Treatment of earlystage breast cancer. National Institutes of Health Consensus Development Panel. J Natl Cancer Institute Monographs 11:1?5, 1992.
2. Cox DR: Regression models and life-tables. J Roy Stat Soc [B] 34:187?200, 1972.
3. Tibshirani R: A plain man's guide to the proportional hazards model. Clin Invest Med 5: 63?68, 1982.
4. Erlichman C, Warde P, Gadalla T, Ciampi A, Baskerville T: RECPAM analysis of prognostic factors in patients with stage III breast cancer. Breast Cancer Res Treat 16:231?242, 1990.
5. Breiman L, Freidman JH, Olshen RA: Classification and Regression Trees. Wadsworth, Belmont CA, 1984.