Funding for this research was provided by:
Ministerio de Economía y Competitividad (DPI2016-75791-C2-1-P)
Generalitat de Catalunya (2017-SGR-1234)
Text and Data Mining valid from 2020-01-06
Received: 23 October 2019
Accepted: 22 December 2019
First Online: 6 January 2020
: The authors declare that they have no competing interests.