Open letter to Simon Stevens to ensure that tobacco dependence treatment is provided for every smoker cared for by the NHS, as part of the long term plan - Goddard,A; Burn,W; Regan,L; Viner,R; Stokes-Lampard,H; Mahajan,R; Anagnostara,E; Hollins,S; Wessely,S; Arnott,D; Cramer,S; Watson,M; et al. (BMJ, 2018)