Age of smoking initiation and risk of breast cancer in a sample of Ontario women

Abstract

OBJECTIVES To examine the association between time of smoking initiation and both the independent and joint effects of active and passive tobacco smoke exposure and the risk of breast cancer in a sample of Ontario women. METHODS Data from two large population-based case-control studies conducted among Ontario women aged 25-75 years were combined for… (More)
DOI: 10.1186/1617-9625-5-4

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