RT Journal Article SR Electronic T1 A Philip Morris advertisement for its heated tobacco product IQOS sets a troubling precedent JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP e168 OP e170 DO 10.1136/tobaccocontrol-2019-055363 VO 29 IS e1 A1 Eric C Leas A1 Joanna E Cohen A1 John W Ayers YR 2020 UL http://tobaccocontrol.bmj.com/content/29/e1/e168.abstract AB