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History
- Received April 12, 2020
- Revision requested June 16, 2020
- Accepted September 8, 2020
- Published online April 29, 2021.
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- Previous version (December 9, 2020 - 16:30).
- Previous version (April 19, 2021 - 16:05).
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© The Authors http://creativecommons.org/licenses/by/4.0/This article is Open Access: CC BY 4.0 licence (http://creativecommons.org/licences/by/4.0/).
Author Information
- Julia Hippisley-Cox, MD, Professor of clinical epidemiology and general practice
- Carol Coupland, PhD, Professor of medical statistics in primary care
- Address for correspondence
Julia Hippisley-Cox, Nuffield Department of Primary Care Health Sciences, University of Oxford Radcliffe Observatory Quarter, Woodstock Road, Oxford OX2 6GG, UK. Email: julia.hippisley-cox{at}phc.ox.ac.uk