1. From the Department of Medical Oncology, Dana–Farber Cancer Institute (A.H.P.), Harvard Medical School (A.H.P., R.D.G.), the International Breast Cancer Study Group Statistical Center and the Department of Data Science, Division of Biostatistics, Dana–Farber Cancer Institute (S.M.N., R.D.G.), and Frontier Science and Technology Research Foundation and Harvard T.H. Chan School of Public Health (R.D.G.) — all in Boston; the International Breast Cancer Study Group (M.R., K. Ribi, R.K., G.V., A. Goldhirsch)...