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BACKGROUND
Prospective cohort studies contribute importantly to understanding the role of lifestyle, genetic, and other factors in chronic disease etiology.
METHODS
The American Cancer Society (ACS) recruited a new prospective cohort study, Cancer Prevention Study 3 (CPS‐3), between 2006 and 2013 from 35 states and Puerto Rico. Enrollment took place primarily at ACS community events and at community...
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