1 Addictions Department Institute of Psychiatry, Psychology and Neuroscience King's College London London, United Kingdom; UK Centre for Tobacco and Alcohol Studies University of Nottingham Nottingham, United Kingdom. Electronic address: katherine.east@kcl.ac.uk.
2 Addictions Department Institute of Psychiatry, Psychology and Neuroscience King's College London London, United Kingdom; UK Centre for Tobacco and Alcohol Studies University of Nottingham Nottingham, United Kingdom.
3 Department of Biostatistics and Health InformaticsInstitute of Psychiatry, Psychology and Neuroscience King's College London London, United Kingdom; Centre for Implementation Science Department of Health Services and Population Research Institute of Psychiatry, Psychology and Neuroscience King's College London London, United Kingdom.
4 Public Health England London, United Kingdom; Action on Smoking and Health UK London, United Kingdom.
5 Action on Smoking and Health UK London, United Kingdom.