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Breast cancer and combined oral contraceptives: results from a multinational study. The WHO Collaborative Study of Neoplasia and Steroid Contraceptives.
A collaborative, hospital-based case-control study was conducted at 12 participating centres in 10 countries. Based on data from personal interviews of 2,116 women with newly diagnosed breast cancer and 12,077 controls, the relative risk of breast cancer in women who ever used oral contraceptives wa...
Formato: | Texto |
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Lenguaje: | English |
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Nature Publishing Group
1990
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1971339/ https://www.ncbi.nlm.nih.gov/pubmed/2404507 |