Funding for this research was provided by:
Ministerio de Economía y Competitividad ((CSO2017-82110-R))
Gobierno de Aragón-Universidad de Zaragoza (Grupo de Referencia en Investigación BYCS)
Received: 18 April 2018
Accepted: 9 June 2020
First Online: 16 June 2020
Ethics approval and consent to participate
: All procedures performed in this study were in accordance with the ethical standards of the Zaragoza University and with the 1964 Helsinki Declaration and its later amendments.Subjects were informed about the research and signed an informed consent prior to the survey. The data treatment was anonymous.
: Not applicable.
: The authors declare that they have no competing interests.