E cigarettes compromise the gut barrier and trigger inflammation: iScience Increased Expression of Proatherogenic Proteins in Immune Cell Subtypes in Tobacco Cigarette Smokers But Not in Electronic Cigarette Vapers Canadian Journal of Cardiology Photometric Monitoring of Electronic Cigarette Puff Topography Effect of unguided e cigarette provision on uptake, use, and smoking cessation among adults who smoke in the USA: a naturalistic, randomised, controlled clinical trial ScienceDirect