Disclaimer
The views and opinions expressed herein are those of the authors and do not necessarily reflect those of the NIHR HSR program or the Department of Health.
Financial & competing interests disclosure
This project is funded by the National Institute for Health Research Health Services Research Program (project number HSR: 09/2001/21). Steve Green is the Director and Company Secretary of Quality Healthcare Advice Trent. The authors have no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript apart from those disclosed.
No writing assistance was utilized in the production of this manuscript.