Updates are available Correction dated 2020-10-30
Click to view Correction: https://doi.org/10.1186/s12913-020-05832-z
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Authors
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Funding
Funding for this research was provided by:
Department of Health, UK (PR-R15-0116-23001)
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Article History
Received: 5 February 2020
Accepted: 17 September 2020
First Online: 25 September 2020
Change Date: 30 October 2020
Change Type: Correction
Change Details: An amendment to this paper has been published and can be accessed via the original article.
Ethics approval and consent to participate
: Not applicable, as all data used was already in the public domain.
: Not applicable.
: The authors declare that they have no competing interests.
