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APA Citation
Walker, N., Parag, V., Verbiest, M., Laking, G., Laugesen, M., & Bullen, C. (2020). nicotine patches used in combination with e-cigarettes (with and without nicotine) for smoking cessation: a pragmatic, randomised trial. Lancet, 8(1), 54–64. http://access.bl.uk/ark:/81055/vdc_100098436972.0x00000b