Roncero, A M
López-Nieva, P
Cobos-Fernández, M A
Villa-Morales, M
González-Sánchez, L
López-Lorenzo, J L
Llamas, P
Ayuso, C
Rodríguez-Pinilla, S M
Arriba, M C
Piris, M A
Fernández-Navarro, P
Fernández, A F
Fraga, M F
Santos, J
Fernández-Piqueras, J
Article History
Received: 10 March 2015
Revised: 14 July 2015
Accepted: 20 July 2015
First Online: 28 July 2015
Competing interests
: The authors declare no conflict of interest.