U.S. Vape Regulations: PMTA Registration and State Compliance Are You Carding For e Cigarettes? We Card E cigarette specialty retailers: Data to assess the association between retail environment and student e cigarette use ScienceDirect Doctors fail to help teens quit smoking, study finds GMA Should America ban flavoured e cigarettes? Analysis of state portrayals of the risks of e cigarette use and the cause of the EVALI outbreak Harm Reduction Journal Springer Nature Link