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Contributors OAW led the writing of the Ad Watch and MJL contributed to writing and editing.
Funding This work was supported in part by a grant from the National Cancer Institute and the FDA Center for Tobacco Products (K01CA189301, OAW Principal Investigator).
Disclaimer The content is solely the responsibility of the authors and does not necessarily represent the official views of the funding sources.
Competing interests None declared.
Provenance and peer review Not commissioned; externally peer reviewed.
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