Biomarkers of potential harm in people switching from smoking tobacco to exclusive e‐cigarette use, dual use or abstinence: secondary analysis of Cochrane systematic review of trials of e‐cigarettes for smoking cessation. - Hartmann‐Boyce, Jamie; Butler, Ailsa R.; Theodoulou, Annika; Onakpoya, Igho J.; Hajek, Peter; Bullen, Chris; Rigotti, Nancy A.; Lindson, Nicola (Addiction, 2023)