Funding for this research was provided by:
Oral and Dental Research Trust (-)
Received: 31 January 2020
Accepted: 7 October 2020
First Online: 20 October 2020
Change Date: 11 February 2021
Change Type: Correction
Change Details: A Correction to this paper has been published:
Change Details: https://doi.org/10.1186/S12889-021-10303-Z
Ethics approval and consent to participate
: Ethics committee approval was sought and granted from the Coventry and Warwickshire ethics committee and the University of Birmingham was the study sponsor (RG_16–102). Written consent for participation was obtained from all participants.West Midlands – Coventry and Warwickshire Research Ethics CommitteeREC reference: 17/WM//0022Protocol number: RG_16–102IRAS project ID:200232
: Not applicable.
: The authors declare that they have no competing interests.