- Received May 23, 2016.
- Revision requested June 21, 2016.
- Accepted August 23, 2016.
- Published online March 30, 2017.
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© British Journal of General Practice 2017
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- Jessica Harris, PhD, Research fellow
- Aziz Sheikh, OBE, MD, MSc, FRCP, FRCGP, FRCPE, FRSE, FFPH, FACMI, FMedSci
- Emma Davidson, MBChB, MPH, FNZCPHM, Research fellow
- Samantha Walker, PhD
- Deputy chief executive and director of research and policy, Asthma UK, London; honorary lecturer, Usher Institute of Population Health Sciences and Informatics, University of Edinburgh, Edinburgh.
- Address for correspondence
Victoria S Hammersley, Usher Institute of Population Health Sciences and Informatics, Nine Edinburgh Bioquarter, 9 Little France Road, Edinburgh, EH16 4UX, UK. E-mail: