Evaluating trends in recruitment challenges in vape shop research, e cigarette product characteristics and use among shop customers from 2019 to 2023: A mixed methods study Addictive e cigarette giant agrees to pay $40M to North Carolina The Hill Vaping and COVID 19 pandemic: changes in e cigarette use and conclusions for the future narrative review A narrative review evaluating the safety and efficacy of e cigarettes as a newly marketed smoking cessation tool Dominic Worku, Elliott Worku, 2019 FDA's product standard setting a maximum level of nicotine should be expanded to all tobacco products including e cigs and nicotine pouches Stanton Glantz blog FDA investigates reports of seizures among e cigarette users PBS News