Funding for this research was provided by:
Ministerio de Educación, Cultura y Deporte (PSI 2014-53321P, AP2008-00065)
Text and Data Mining valid from 2017-06-10
First Online: 10 June 2017
Compliance with Ethical Standards
: This research was funded by grants AP2008–00065 and PSI 2014-53321P from the Spanish Ministry of Education, Culture, and Sports.
: The authors do not have any conflict of interests.
: The research conducted has obtained ethical approval from the authors’ institution and were in accordance with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: The different studies have been carried after obtaining informed consent from the participants.