The impact of e cigarette exposure on different organ systems: A review of recent evidence and future perspectives ScienceDirect CDC warns consumers to stop smoking e cigarettes after lung illnesses rise Tobacco control UICC Health impacts of electronic cigarettes ANU National Centre for Epidemiology and Population Health WHO estimates at least 15 million teenagers use e cigarettes worldwide Reuters As National Sales of E Cigarettes Climb, Report Shows that State Restrictions on Flavored Products Are Critical to Protect Young People CDC Foundation