Use Patterns, Flavors, Brands, and Ingredients of Nonnicotine e-Cigarettes

Use Patterns, Flavors, Brands, and Ingredients of Nonnicotine e-Cigarettes Among Adolescents, Young Adults, and Adults in the United States, in JAMA Network Open

key takeaway: "In this study of adolescents, young adults, and adults, a sizeable proportion reported having used nonnicotine e-cigarettes and co-using them with nicotine e-cigarettes."