A scoping review of studies on the health impact of electronic nicotine delivery systems Internal and Emergency Medicine Springer Nature Link E cigarettes: a doctor's view of the good, the bad and the ugly E cigarettes increase harm to smokers, so should not be promoted as a harm reduction strategy (in 10 slides) Stanton Glantz blog Teens who use e cigarettes more likely to start smoking, study says Johns Hopkins researchers find thousands of unknown chemicals in electronic cigarettes Hub