González-Pacheco, N
Sánchez-Luna, M
Ramos-Navarro, C
Navarro-Patiño, N
de la Blanca, A R-S
Article History
Received: 19 April 2015
Revised: 3 November 2015
Accepted: 10 November 2015
First Online: 7 January 2016
Competing interests
: MSL has received advisory board consulting fees from Dräger. The remaining authors have no conflicts to declare.