E cigarette aerosol exposure can cause craniofacial defects in Xenopus laevis embryos and mammalian neural crest cells PLOS One E liquids and vanillin flavoring disrupts retinoic acid signaling and causes craniofacial defects in Xenopus embryos ScienceDirect Frontiers Aerosolized nicotine from e cigarettes alters gene expression, increases lung protein permeability, and impairs viral clearance in murine influenza infection Chronic electronic cigarette exposure in mice induces features of COPD in a nicotine dependent manner Thorax Chronic electronic cigarette exposure in mice induces features of COPD in a nicotine dependent manner Thorax