Is Vaping Better Than Smoking? American Heart Association How Juul created a market, fueled a crisis, and why regulators failed to stop it : Planet Money : NPR Juul E Cigarettes Side Effects, Addiction Risks & Teen Use JUUL At A Crossroads: E Cig Makers Will Testify To Congress As Company Faces Legal And Financial Turmoil Teens say they don't vape, they 'Juul.' That makes the activity hard to track Los Angeles Times