Which Electronic Cigarette Is Best for Quitting Smoking? X Bar How Switching to E Cigarettes After Smoking Cessation Affects Lung Cancer Risk Amazon.com: Stop Smoking Aid that Works, Quit Smoking in Just 8 Weeks, Compact Advanced Smoking Cessation Product & Quit Smoking Tool by Filtrim, Gold Finish (2.5 x 1.2 x 0.3 Inches) : Health & Household E cigarettes more effective than other smoking cessation aids, new review finds Nuffield Department of Primary Care Health Sciences University of Oxford