RT Journal Article SR Electronic T1 The use of flavour cards and other additives after a menthol ban in Canada JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP 601 OP 602 DO 10.1136/tobaccocontrol-2020-055698 VO 30 IS 5 A1 Michael O Chaiton A1 Robert Schwartz A1 Joanna E Cohen A1 Eric Soule A1 Bo Zhang A1 Thomas Eissenberg YR 2021 UL http://tobaccocontrol.bmj.com/content/30/5/601.abstract AB