Disposable ecigs expose users to much higher levels of toxic metals than earlier generations of ecigs or cigarettes Stanton Glantz blog Vaping Related Acute Parenchymal Lung Injury CHEST Truth About E Cigarettes and Vaping: Are They Safer Than Smoking for Lung Cancer Risk? Smoking Plus Vaping Quadruples Lung Cancer Risk Respiratory Therapy Scientific review finds e cigarettes likely cause lung and oral cancer Los Angeles Times