Demographic, Clinical, and Behavioral Factors Associated With Electronic Nicotine Delivery Systems Use in a Large Cohort in the United States oleh Shauna Goldberg Scott MPH, Heather S. Feigelson PhD, MPH, John David Powers MS, Morgan N. Clennin PhD, MPH, Jason A. Lyons MA, Mark T. Gray BS, Anil Vachani MD, MS, Andrea N. Burnett-Hartman PhD, MPH