Sangiao-Alvarellos, S.
Manfredi-Lozano, M.
Ruiz-Pino, F.
León, S.
Morales, C.
Cordido, F.
Gaytán, F.
Pinilla, L.
Tena-Sempere, M.
Article History
Received: 14 June 2015
Accepted: 29 September 2015
First Online: 23 October 2015
Competing interests
: The authors declare no competing financial interests.