Sanz-Piña, Elena
Santurtún, Ana http://orcid.org/0000-0003-3846-556X
Freire, Javier
Gómez-Román, Javier
Colorado, Mercedes
Zarrabeitia, María T.
Article History
Accepted: 12 November 2018
First Online: 10 December 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This study was reviewed and approved by the Clinical Research Ethics Committee of Cantabria.
: All research participants gave their written consent to participate in the study.