Jackson, Sarah E.
Proudfoot, Hannah
Brown, Jamie
East, Katherine
Hitchman, Sara C.
Shahab, Lion
Article History
Received: 16 December 2019
Accepted: 29 May 2020
First Online: 26 June 2020
Competing interests
: L.S. has received a research grant and honoraria for a talk and travel expenses from manufacturers of smoking cessation medications (Pfizer and Johnson & Johnson). J.B. has received unrestricted research funding from Pfizer, who manufacture smoking cessation medications. All authors declare no financial links with tobacco companies or e-cigarette manufacturers or their representatives. All other authors declare no competing interests.