E cigarette aerosol exposure can cause craniofacial defects in Xenopus laevis embryos and mammalian neural crest cells PLOS One E cigarette aerosol exposure can cause craniofacial defects in Xenopus laevis embryos and mammalian neural crest cells PLOS One Sex specific alterations in pulmonary metabolic, xenobiotic and lipid signalling pathways after e cigarette aerosol exposure during adolescence in mice BMJ Open Respiratory Research Science & Tech Spotlight: E cigarettes U.S. GAO