E liquids and vanillin flavoring disrupts retinoic acid signaling and causes craniofacial defects in Xenopus embryos ScienceDirect What chemicals are in a cigarette? What does smoking do to your body? Cancer Research UK Top 10 E Cigarette Companies Worldwide: A Look at the Industry Leaders Nicotine Alone Does Not Lead To Addiction: Additives Found In Both Light Cigarettes And E cigs Harmful Nose Only Exposure to Cherry and Tobacco Flavored E Cigarettes Induced Lung Inflammation in Mice in a Sex Dependent Manner