Giancardo, L.
Sánchez-Ferro, A.
Arroyo-Gallego, T.
Butterworth, I.
Mendoza, C. S.
Montero, P.
Matarazzo, M.
Obeso, J. A.
Gray, M. L.
Estépar, R. San José
Article History
Received: 20 April 2016
Accepted: 12 September 2016
First Online: 5 October 2016
Competing interests
: The authors declare no competing financial interests.