Disposable vapes spew toxic metals at higher levels than cigarettes, study finds British Journal of Midwifery Electronic cigarettes for smoking cessation in pregnancy: a nationwide mixed methods study British Journal of Midwifery Metals found in disposable e cigarette vapor could pose health risks American Chemical Society Nicotine absorption from electronic cigarette use: comparison between first and new generation devices Scientific Reports How disposable vapes have become a prominent part of young people's lives UEA