Hernández, Carme
Alonso, Albert
Garcia-Aymerich, Judith
Serra, Ignasi
Marti, Dolors
Rodriguez-Roisin, Robert
Narsavage, Georgia
Carmen Gomez, Maria
Roca, Josep
,
Article History
Received: 27 October 2014
Revised: 10 February 2015
Accepted: 10 February 2015
First Online: 9 April 2015
Competing interests
: The authors declare no conflict of interest.