1. Department of Applied Health Research University College London London UK
2. Institute of Epidemiology and Healthcare University College London London UK
3. School of Health Sciences University of Surrey Guildford UK
4. Centre for Cancer Prevention Wolfson Institute of Preventive Medicine Barts and The London School of Medicine and Dentistry Queen Mary University of London London UK
5. Lungs for Living Research Centre UCL Respiratory Division of Medicine University College London London UK
6. Research Department of Behavioural Science and Health University College London London UK