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BackgroundEstimation of attributable fractions for tobacco and alcohol, and investigation of the association between body mass index (BMI) and head and neck cancer risk have largely been in case‐control studies. These aspects and physical activity need to be assessed as possible head and neck cancer risk/protective factors in a cohort study.
MethodsIn the Prostate, Lung, Colorectal, and Ovarian (PLCO)...
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