E cigs market to teens using big tobacco tactics Zebrafish (Danio rerio) as a Model for the Study of Developmental and Cardiovascular Toxicity of Electronic Cigarettes Investigating Behavioral and Neuronal Changes in Adolescent Mice Following Prenatal Exposure to Electronic Cigarette (E Cigarette) Vapor Containing Nicotine Electronic cigarettes for smoking cessation The BMJ E liquids and vanillin flavoring disrupts retinoic acid signaling and causes craniofacial defects in Xenopus embryos ScienceDirect Cigarette Smoke Exposure in Mice JoVE Journal