1. Health Economics Unit, Institute of Applied Health Research, Public Health Building, University of Birmingham, Birmingham, UK
2. Faculty of Public Health and Policy, 15-17 Tavistock Place, London School of Hygiene and Tropical Medicine, London, UK
3. Primary Care and Population Sciences Division, University of Southampton, Aldermoor Health Centre, Aldermoor Close, Southampton, UK
4. Julius Center for Health Sciences and Primary Care, University Medical Center, Utrecht, Netherlands
5. Nuffield Department of Primary Care Health Sciences, University of Oxford, New Radcliffe House, Radcliffe Observatory Quarter, Woodstock Road, Oxford, UK
6. Laboratory of Medical Microbiology, Vaccine & Infectious Disease Institute (VAXINFECTIO), University of Antwerp, Antwerp, Belgium
7. Centre for General Practice, Department of Primary and Interdisciplinary Care (ELIZA) Vaccine & Infectious Disease Institute, University of Antwerp, Antwerp, Belgium
8. Division of Health Sciences, Warwick Medical School, University of Warwick, Coventry, UK
9. Health Economics at Bristol, Health and Population Sciences, Bristol Medical School, University of Bristol, 1–5 Whiteladies Road, Bristol, UK