Guidance for Healthcare Providers on Evaluating and Tracking Patient Use of E Cigarettes or ENDS Products American Lung Association Secondhand Smoke and Secondhand Vaping: Both Bad for Kids University Hospitals Does cannabis create thirdhand smoke? Thirdhand Smoke Resource Center Vaping Indoors and How it Contributes to Sick Home Syndrome Bactronix Disposable E Cigarettes More Toxic Than Traditional Cigarettes UC Davis