Understanding potential mechanisms of harm: the drivers of electronic cigarette induced changes in alveolar macrophages, neutrophils, and lung epithelial cells American Journal of Physiology Lung Cellular and Molecular Physiology American Thirdhand Vapor from E cigarettes Damages the Lungs of Mice Thirdhand Smoke Resource Center Why Are E Cigarettes Safer Than Cigarettes Vape Blog Study Finds E Cigarettes Contain Chemical Tied to 'Popcorn Lung' WSJ Prevalence of cigarette and e cigarette use among U.S. adults eligible for lung cancer screening based on updated USPSTF guidelines ScienceDirect