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History
- Received April 18, 2019
- Revision requested May 10, 2019
- Accepted June 21, 2019
- Published online March 26, 2020.
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- Previous version (February 10, 2020 - 16:30).
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© British Journal of General Practice 2020
Author Information
- Ying Chen, PhD, Research fellow in biostatistics
- Richard Hayward, PhD, Senior GP research fellow
- Carolyn A Chew-Graham, MD, Professor of general practice research
- Richard Hubbard, MD, Professor of respiratory epidemiology
- Peter Croft, MD, Emeritus professor of epidemiology
- Keith Sims, Convener, Breathe Easy British Lung Foundation Support Group
- Kelvin P Jordan, PhD, Professor of biostatistics
- School of Primary, Community and Social Care, Centre for Prognosis Research, Keele University, Keele.
- Address for correspondence
Ying Chen, School of Primary, Community and Social Care, Keele University, Staffordshire ST5 5BG, UK. Email: y.chen1{at}keele.ac.uk