Funding for this research was provided by:
Academy of Medical Sciences and Wellcome Trust (AMS_HOP001\1060)
Text and Data Mining valid from 2020-05-11
Received: 9 December 2019
Accepted: 19 March 2020
First Online: 11 May 2020
Ethics approval and consent to participate
: All data were anonymised by the data holders before being accessed by the research team. Approval was granted by the University of Southampton Faculty of Medicine Ethics Committee (ID 24433) and the Health Research Authority (HRA) approval (IRAS 242031). Consent to participate is not applicable.
: The authors declare that they have no competing interests.