Funding for this research was provided by:
Ministerio de Economía, Industria y Competitividad, Gobierno de España (RYC-2016-19353)
Centro de Estudios Andaluces (PRY120/14)
Text and Data Mining valid from 2019-07-16
Received: 28 March 2019
Accepted: 4 July 2019
First Online: 16 July 2019
Ethics approval and consent to participate
: This study has been conducted according to the principles expressed in the Declaration of Helsinki, and written informed consent was obtained from all the participants.
: Not applicable.
: The authors declare that they have no competing interests.