E Cigarettes, Vaping & Lung Health Pulmonary & Respiratory Care Loma Linda University Health FDA hazy on e cigarettes' safety CNN.com A look at e cigarettes Elmhurst Dentist Elmhurst Dental Viewpoints: Is the jury still out on e cigarettes? NZ Drug Foundation Teens who use flavored e cigarettes more likely to start smoking Harvard Health FDA warns retailers against illegal sale of e cigarettes to children PBS News