1. Research Department of Behavioural Science and Health and
2. Lungs for Living Research Centre, UCL Respiratory, Division of Medicine, University College London, London, United Kingdom
3. Leeds Institute of Health Sciences, University of Leeds, Leeds, United Kingdom
4. National Centre for Smoking Cessation and Training, Dorchester, United Kingdom
5. Respiratory Medicine Unit, David Evans Research Centre, Nottingham University Hospitals, Nottingham, United Kingdom
6. Department of Thoracic Medicine, Homerton University Hospital, London, United Kingdom
7. Department of Thoracic Medicine, University College London Hospital, London, United Kingdom
8. Killick Street Health Centre, London, United Kingdom
9. Wolfson Institute of Preventive Medicine, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom; and
10. School of Cancer and Pharmaceutical Sciences, King’s College London, London, United Kingdom