Funding for this research was provided by:
Medical Research Council (MR/R502248/1)
Text and Data Mining valid from 2019-06-28
Received: 29 October 2018
Accepted: 14 June 2019
First Online: 28 June 2019
Ethics approval and consent to participate
: This study did not involve human participants, data or tissue and ethical approval was not required.
: Not applicable.
: The authors declare that they have no competing interests.