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The relative risk for lung cancer in second hand smokers versus non-smokers is approximately 1.3.<ref>{{Ref PCPBoD8|214}}</ref> | The relative risk for lung cancer in second hand smokers versus non-smokers is approximately 1.3.<ref>{{Ref PCPBoD8|214}}</ref> | ||
==No association with | ==No association with smoking== | ||
*Breast cancer. | *Breast cancer. | ||
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