NCT02416011.

Trial name or title	Smoking cessation self‐help for dual users of tobacco cigarettes and e‐cigarettes
Methods	Randomised controlled trial
Participants	Adult current dual users of tobacco cigarettes and e‐cigarettes
Interventions	∙ Assessment only ∙ Generic self‐help ∙ Targeted self‐help
Outcomes	Smoking abstinence at 24 months
Starting date	31/03/2015
Contact information	Thomas Brandon; Thomas.Brandon@moffitt.org
Notes	Funding: this work is supported by the National Institute on Drug Abuse of the National Institutes of Health (R01DA037961)