1. Nuffield Department of Primary Care Health Sciences; University of Oxford; Oxford UK
2. Norwich Medical School; University of East Anglia; Norwich UK
3. Cochrane Australia; School of Public Health & Preventive Medicine; Melbourne Australia
4. Tobacco Research and Treatment Center, Department of Medicine; Massachusetts General Hospital and Harvard Medical School; Boston Massachusetts USA
5. London Southbank University; London UK
6. Department of Health Promotion and Policy; University of Massachusetts; Amherst MA USA