Sanchez-NiƱo, M D
Fernandez-Fernandez, B
Perez-Gomez, M V
Poveda, J
Sanz, A B
Cannata-Ortiz, P
Ruiz-Ortega, M
Egido, J
Selgas, R
Ortiz, A
Article History
Received: 7 January 2014
Revised: 21 December 2014
Accepted: 29 December 2014
First Online: 12 February 2015
Competing interests
: The authors declare no conflict of interest.