García-Fuente, Amador
Vázquez, Fernando
Viéitez, José M.
García Alonso, Francisco J.
Martín, José I.
Ferrer, Jaime
Article History
Received: 15 January 2018
Accepted: 1 March 2018
First Online: 21 March 2018
Competing Interests
: The authors declare no competing interests.