Funding for this research was provided by:
National Institute for Health Research (NIHR).
Received: 29 August 2018
Accepted: 11 February 2019
First Online: 22 March 2019
Ethics approval and consent to participate
: All data analysed in this study were secondary data that had been previously anonymised. This secondary data analysis study approved by the School of Medicine Ethics Committee (SoMREC) - University of Leeds (Ref no: MREC16-046). Ethical approval for the VOICES survey was granted from Southampton University Ethics Committee and the National Statistician’s Data Ethics Advisory [CitationRef removed].
: Not applicable
: The authors declare that they have no competing interests.
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