Fernández-Ramos, M. D.
Aguayo-López, M. L.
Pérez de Vargas-Sansalvador, I.
Capitán-Vallvey, L. F.
Article History
Received: 27 April 2018
Revised: 8 June 2018
Accepted: 19 June 2018
First Online: 5 July 2018
Compliance with ethical standards
:
: The authors declare that they have no competing interests.