Funding for this research was provided by:
The Spanish Ministry of Economy, Industry, and Competitiveness
Universidad de Ciencias Aplicadas y Ambientales. U.D.C.A
Text and Data Mining valid from 2019-05-01
Received: 17 July 2018
Accepted: 4 April 2019
First Online: 1 May 2019
: The authors declare no competing interests.