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Contributors MS conceived of this paper, MB coordinated tobacco product reference materials and JO assisted. JO and MS drafted the manuscript and all authors contributed with revisions and approved the final version of the paper.
Funding This study was supported by Quit Victoria, Cancer Council Australia, Cancer Council South Australia, Cancer Council Victoria and Action on Smoking and Health (UK) and its partner organisations Cancer Research UK, Smokefree Southwest, Fresh and Tobacco Free Futures.
Competing interests None.
Provenance and peer review Not commissioned; externally peer reviewed.
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