Risk factors for breast cancer

doi:10.1136/bmj.310.6979.598b

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K McPherson,
C M Steel,
J M Dixon,
W R Miller

Professor of public health epidemiology London School of Hygiene and Tropical Medicine, London WC1E 7HT
Professor of medical and biological sciences University of St Andrews, St Andrews, Fife
Consultant surgeon Edinburgh Breast Unit, University Department of Surgery, Royal Infirmary, Edinburgh EH3 9YW
Professor of experimental oncology ICRF Oncology Unit, Western General Hospital, Edinburgh EH4 2XU

EDITOR,—Peter J Lewis comments on the fact that our article on risk factors for breast cancer did not include the role of xeno-oestrogens and progesterone deficiency.1 The aim of the ABC series is to review the current state of knowledge succinctly. The article did not mention the two factors …