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C. Research, C. Hawaii, U. Kolonel, A. Hu, . Johnson et al., Catalán Institut of Oncology S De Sanjosé Central Institute of Cancer Research Centre for Genetic Epidemiology JL Hopper; Channing Laboratory, Brigham and Women's Hospital, Harvard Medical School, MA, USA: G Colditz for Nurses' Health Study Research Group, Centers for Disease Control & Prevention T

H. General-de-mexico, M. City, . Mexico, . Hr-cuevas, . Ontiveros et al., Institute of Cancer Research, Sutton and London School of Hygiene and Tropical Medicine, UK: J Peto; International Agency for Research in Cancer Institut universitaire de medecine sociale et preventive, Cancer Research UK Genetic Epidemiology Laboratory J Cancer Research UK Department of Mathematics Statistics & Epidemiology London School of Hygiene & Tropical Medicine J

M. University, T. Maastricht, R. Netherlands, P. Goldbohm, R. Van-den-brandt et al., M Ferraroni; Montpellier Cancer Centre & INSERM Nairobi Centre for Research in Reproduction HP Lee; The Netherlands Cancer Institute The Netherlands: MA Rookus, FE van Leeuwen for the Netherlands Oral Contraceptives and Breast Cancer Study Group; New Jersey State Department of Health, NJ, USA: JA Schoenberg; New South Wales Cancer Council, Sydney, Australia: M McCredie; Columbia University School of Public Health MD Gammon; Ontario Cancer Treatment & Research Foundation EA Clarke; Department of Public Health & Primary Care, National Cancer Institute National Institute of Child Health & Human Development, MD Cancer Research UK Epidemiology Unit Cancer Research UK/MRC/BHF Clinical Trial Service Unit & Epidemiological Studies Unit Radiation Effects Research Foundation

S. Vasteras, U. Bergkvist, . Unfpa, . Who, . Holck et al., A Kalache; World Health Organisation,World Bank Special Programme of Research, Development and Research Training in Human Reproduction Analysis and writing committee, Steering committee: Skegg D (Chairman)