Maynar, Marcos
Muñoz, Diego http://orcid.org/0000-0003-4107-6864
Alves, Javier
Barrientos, Gema
Grijota, Francisco Javier
Robles, María Concepción
Llerena, Francisco
Article History
Received: 20 February 2018
Accepted: 26 March 2018
First Online: 5 April 2018
Compliance with Ethical Standards
: All participants were informed about the aim and procedures of the study; they gave their informed consent and participated voluntarily. The study was approved by the University of Extremadura Ethics Committee in accordance with the latest version of the Helsinki declaration for human research.