Funding for this research was provided by:
Scottish Funding Council (242343290)
Text and Data Mining valid from 2020-04-26
Received: 5 November 2019
Accepted: 30 March 2020
First Online: 26 April 2020
Ethics approval and consent to participate
: Formal ethical approval was not required for this review.
: Not applicable.
: The authors declare they have no competing interests.