Pirie, KirstinBeral, ValeriePeto, RichardRoddam, Andrew WReeves, Gillian KGreen, JaneAustoker, JoanBanks, EmilyChurch, JudithEnglish, RuthPatnick, JuliettaVessey, MartinWallis, Matthew2015-12-080300-5771http://hdl.handle.net/1885/33831Background: Active smoking has little or no effect on women's risk of developing breast cancer, but it has been suggested that passive exposure to tobacco smoke may increase this risk among women who have never smoked. Objective: To evaluate the possibleKeywords: cancer; cohort analysis; female; meta-analysis; risk assessment; smoking; article; breast cancer; cancer incidence; cancer risk; cigarette smoking; follow up; human; medical information; medical record; passive smoking; population exposure; priority journ Female breast cancer; Meta-analysis; Passive smoking; Prospective cohort studyPassive smoking and breast cancer in never smokers: prospective study and meta-analysis200810.1093/ije/dyn1102015-12-08