K.T. reports grants and other financial support from the National Institute for Health Research (NIHR) for this study. N.W. and M.S. report grants from the National Institute for Health Research during the conduct of the study and Honoraria from the Association of British Pharmaceutical Industry outside the submitted work. D.P. reports grants from the Medical Research Council during the conduct of the study, personal fees from the Association of the British Pharmaceutical Industry and personal fees from UCB outside the submitted work. E.K. reports personal fees from Novartis Pharma and Pfizer outside the submitted work. M.M. reports grants from Pfizer outside the submitted work. J.L.L., E.K. and M.D. were funded by the National Institute for Health Research for the project. The funder of the study had no role in the study design, data collection, data analysis, data interpretation or writing of the report. The corresponding author had full access to all the data in the study and had final responsibility for the decision to submit for publication.
The study was funded by the NIHR Health Technology Assessment programme (project number 15/58/18). This publication presents independent research funded by the National Institute for Health Research (NIHR). The views expressed are those of the authors and not necessarily those of the NHS, the NIHR or the Department of Health and Social Care. J.L.L.’s time was also funded by a grant from the Spanish Government (Ministerio de Ciencia e Innovación, project number PID2019‐104033GA‐I00). The authors acknowledge Professor David Gunnell for help with preparing the original project proposal and grant submission, Sarah Dawson and Cath Borwick for help with designing and running search strategies and Olivia Crane and the Public Health Internal Guideline Development team at the National Institute for Health and Care Excellence (NICE) for their collaboration.
© 2021 The Authors. Addiction published by John Wiley & Sons Ltd on behalf of Society for the Study of Addiction.