Funding for this research was provided by:
Consejería de Salud, Junta de Andalucía (P12-AGR-2581)
Received: 15 October 2018
Accepted: 24 May 2019
First Online: 29 May 2019
Compliance with ethical standards
: The authors declare no conflict of interest. The funding sponsor had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, and in the decision to publish the results.