E cigarette smoke damages DNA and reduces repair activity in mouse lung, heart, and bladder as well as in human lung and bladder cells PNAS E Cigarette effects on oral health: A molecular perspective ScienceDirect Toxicity of electronic cigarettes: A general review of the origins, health hazards, and toxicity mechanisms ScienceDirect How Many Juul Pods Equal A Cigarette E cigarette flavored pods induce inflammation, epithelial barrier dysfunction, E cigarettes damage DNA in lab study Toxicological Effects of E Cigarettes on Cells, Animals, and Humans and Mechanisms of Toxicity Springer Nature Link