Footnotes

• Contributors All authors (EB, EI, SJD and MAW) of this research letter directly participated in the planning, execution or analysis phases of the study, and have read and approved this, the final version of the research letter.

• Funding This study was funded by Cancer Council Victoria.

• Competing interests We are employed by a non-profit organisation that conducts public health interventions and advocacy aimed at reducing the harms of tobacco in the community, especially those pertaining to cancer.

• Patient consent for publication Not required.

• Provenance and peer review Not commissioned; externally peer reviewed.