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Systematic review
E-cigarettes may help smokers stop or reduce smoking
  1. Leonie S Brose
  1. Addictions Department, Institute of Psychiatry, Psychology & Neuroscience (IoPPN), King's College London & UK Centre for Tobacco and Alcohol Studies (UKCTAS), London, UK
  1. Correspondence to : Dr Leonie S Brose, Addictions Department, Institute of Psychiatry, Psychology & Neuroscience (IoPPN), King's College London 4 Windsor Walk, London, SE5 8BB, UK; Leonie.brose{at}kcl.ac.uk

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Tobacco smoking kills at least half of all continuing smokers. The nicotine in tobacco smoke is the main cause of addiction but causes almost none of the harm to health.1 Most smokers want to stop and many attempt to, but few succeed long term. Provision of nicotine replacement therapy (NRT) is a widely used and effective way of helping smokers to stop2 and is supported as harm reduction strategy.3

Electronic cigarettes (e-cigarettes), which are not licensed as NRT, produce an aerosol by heating a liquid that usually contains propylene glycol or glycerine, with a wide choice of flavours and different concentrations of nicotine (including none) available. E-cigarettes contain no …

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