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Stead, Lindsay F and Perera, Rafael and Bullen, Chris and Mant, David and Hartmann-Boyce, Jamie and Cahill, Kate and Lancaster, Tim [The Cochrane Library] . (2012) Nicotine replacement therapy for smoking cessation. London: John Wiley & Sons, Ltd. Cochrane Database of Systematic Reviews, 11 DOI: 10.1002/14651858.CD000146.pub4