Funding for this research was provided by:
Versus Arthritis (21755)
Text and Data Mining valid from 2020-02-19
Received: 18 August 2019
Accepted: 15 November 2019
First Online: 19 February 2020
Ethics approval and consent to participate
: The protocol for this study has been approved by Independent Scientific Advisory Committee for Medicines and Healthcare Regulatory Agency database research (Protocol number: 11_113RA4).
: Not applicable.
: WGD has received consultancy fees from Bayer and Google outside of the submitted work. All other authors have no competing interests.