Funding for this research was provided by:
Ontario Ministry of Health and Long Term Care (06697)
Received: 4 July 2018
Accepted: 25 March 2019
First Online: 25 April 2019
Compliance with ethical standards
: DH has provided paid testimony in tobacco litigation on behalf of governments and class-action plaintiffs on issues related to tobacco product science and regulation. MLG reports grants from and served as an advisory board member to pharmaceutical companies that manufacture smoking cessation drugs. The other authors have no competing interests to declare.