1. From Great Ormond Street Hospital, London (P.R.B., K.R., D.R.), Nottingham Clinical Trials Unit, Nottingham (M. Childs), Royal Hospital for Sick Children, Glasgow (M.R.), Northern Institute for Cancer Research, Newcastle University, Newcastle upon Tyne (G.J.V.), and University of Birmingham, Birmingham (B.M.) — all in the United Kingdom; International Breast Cancer Study Group, Bern (R.M.), and Hôpital Universitaire de Genève, Geneva (M.A.) — both in Switzerland; University of Melbourne, Melbourne, VIC,...