Funding for this research was provided by:
Medical Research Council (MR/N013751/1)
Received: 17 August 2020
Accepted: 23 November 2020
First Online: 30 November 2020
Ethics approval and consent to participate
: The study was approved by the independent scientific advisory committee for Clinical Practice Research Datalink research (protocol no. 17_125RMn2.). The interpretation and conclusions contained in this study are those of the authors alone.
: Not applicable.
: All authors state they have nothing to disclose.