RT Journal Article SR Electronic T1 Expression of concern: Identification of volatile constituents released from IQOS heat-not-burn tobacco HeatSticks using a direct sampling method JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP tobaccocontrol-2019-055521 DO 10.1136/tobaccocontrol-2019-055521 A1 Bogdan Dragos Ilies A1 Shamjad P Moosakutty A1 Najeh M Kharbatia A1 S Mani Sarathy YR 2020 UL http://tobaccocontrol.bmj.com/content/early/2020/12/16/tobaccocontrol-2019-055521.abstract AB