Funding for this research was provided by:
Medical Research Council (MR/K015346/1)
Arthritis Research UK (20670, 21754)
Technology Strategy Board (-)
Received: 7 March 2019
Accepted: 10 October 2019
First Online: 19 December 2019
Ethics approval and consent to participate
: The research protocol was approved by The University of Manchester Research Ethics Committee 2 (reference number: 14147). All participants contributed voluntarily and received no financial compensation. Written informed consent and agreement to the publication of anonymous quotations was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.