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Lindson, Nicola and Theodoulou, Annika and Ordóñez-Mena, JM and Fanshawe, TR and Sutton, AJ and Livingstone-Banks, Jonathan and Hajizadeh, A and Zhu, S and Aveyard, P and Freeman, SC and Agrawal, S and Hartmann-Boyce, Jamie (2023) Clinical question: How effective are medications and e-cigarettes for quitting smoking, and what works best? Cochrane Clinical Answers, https://doi.org/10.1002/14651858.CD015226.pub2.