Cunningham, Anthony
Slayford, Sandra
Vas, Carl
Gee, Jodie
Costigan, Sandra
Prasad, Krishna
Article History
Received: 17 June 2016
Accepted: 19 September 2016
First Online: 10 October 2016
Competing interests
: All authors are currently employed by either British American Tobacco (Investments) Ltd (BAT) or Nicoventures Holdings Ltd (both members of the British American Tobacco group of companies). This study was funded by British American Tobacco. All study products were provided by Nicoventures.