1. The assessment of subgroups in clinical trials;Cuzick;Clinical trials in early breast cancer. 2nd Heidelberg Symposium, Heidelberg, Dec 14–17, 1981. Experientia Supplementum,1982
2. Design and analysis of randomized clinical trials requiring prolonged observation of each patient;Peto;Br J Cancer,1976
3. Results of the ATAC (Arimidex, Tamoxifen, Alone or in Combination) trial after completion of 5 years' adjuvant treatment for breast cancer;Lancet,2005
4. Tamoxifen for early breast cancer: an overview of the randomised trials;Lancet,1998
5. Breast cancer and hormonal contraceptives: collaborative reanalysis of individual data on 53 297 women with breast cancer and 100 239 women without breast cancer from 54 epidemiological studies;Lancet,1996