1. Medical Statistics Team, Division of Applied Health Sciences; University of Aberdeen; Aberdeen Scotland
2. Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine and Faculty of Medicine; Imperial College London; London UK
3. Scottish Improvement Science Collaborating Centre, School of Nursing and Health Sciences; University of Dundee; Dundee Scotland
4. School of Epidemiology, Public Health and Preventive Medicine; University of Ottawa; Ottawa Canada
5. Division of Medical and Dental Education; University of Aberdeen; Aberdeen Scotland
6. Consultant Epidemiologist; London and South East PHE Centres; London UK
7. Medical Research Centre; University of Hull; Hull UK
8. School of Economics; University of Nottingham; Nottingham UK
9. Division of Applied Health Sciences; University of Aberdeen; Aberdeen UK
10. Institute of Health & Society; Newcastle University; Newcastle UK