We can hardly say that e cigarettes are somehow safer than conventional cigarettes." Frontiers Carbonyl Emissions in E cigarette Aerosol: A Systematic Review and Methodological Considerations Cigarette lectronique Vente du Meilleur choix en E cigarette Transcriptomic responses in the blood and sputum of cigarette smokers compared to e cigarette vapers Respiratory Research Springer Nature Link Vaping substantially less harmful than smoking, largest review of its kind finds King's College London Chronic E Cigarette Use Impairs Endothelial Function on the Physiological and Cellular Levels Arteriosclerosis, Thrombosis, and Vascular Biology