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Contributors All authors contributed to the writing of the letter. VM, JHS and NM conceived the idea. LB, CE, CA designed the survey. SL undertook the statistical analysis. AJ drafted the first version of the letter.
Funding This study was supported by the NIHR Biomedical Research Centre at University Hospitals Bristol NHS Foundation Trust and the University of Bristol.
Disclaimer The views expressed in this publication are those of the authors and not necessarily those of the NHS, the National Institute for Health Research or the Department of Health and Social Care.
Competing interests None declared.
Patient consent for publication Not required.
Provenance and peer review Not commissioned; internally peer reviewed.
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