Active and passive smoking and risk of breast cancer: a meta-analysis

@article{Macacu2015ActiveAP,
  title={Active and passive smoking and risk of breast cancer: a meta-analysis},
  author={Alina Macacu and Philippe Autier and Mathieu Boniol and Peter Boyle},
  journal={Breast Cancer Research and Treatment},
  year={2015},
  volume={154},
  pages={213-224}
}
Studies on active and passive tobacco smoking and breast cancer have found inconsistent results. A meta-analysis of observational studies on tobacco smoking and breast cancer occurrence was conducted based on systematic searches for studies with retrospective (case–control) and prospective (cohort) designs. Eligible studies were identified, and relative risk measurements were extracted for active and passive tobacco exposures. Random-effects meta-analyses were used to compute summary relative… 
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