1. Enforcement priorities for electronic nicotine delivery systems (ENDS) and other deemed products on the market without premarket authorization (revised) Publication: Silver Spring, MD : Center for Tobacco Products, April 2020 Subject(s): Adolescent BehaviorAdolescent HealthElectronic Nicotine Delivery SystemsVaping -- prevention & controlUnited StatesUnited States. Department of Health and Human Services.United States. Food and Drug Administration.