Funding for this research was provided by:
de Beaumont Foundation (20164698)
Text and Data Mining valid from 2019-08-08
Received: 28 January 2019
Accepted: 26 July 2019
First Online: 8 August 2019
Ethics approval and consent to participate
: Not applicable, datasets analyzed are publicly available.
: Not applicable.
: The authors declare that they have no competing interests.