Funding for this research was provided by:
Consejería de Economía, Innovación, Ciencia y Empleo, Junta de Andalucía (SEJ-1512)
Received: 15 February 2019
Accepted: 14 August 2019
First Online: 27 August 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: For this type of study, formal consent is not required.
: For this type of study, information from individual participants is not used so that this is not required.