Funding for this research was provided by:
Versus Arthritis (20298 (RACE))
Received: 9 December 2019
Accepted: 21 April 2020
First Online: 27 July 2020
Ethics approval and consent to participate
: Ethical approval for this study was granted by the NRES Committee West Midlands - The Black Country (REC 12/WM/0258). All participants gave written informed consent to participate.
: Not applicable.
: The authors have no competing interests to declare.