Miquel, Jordi
Delgado, Eulàlia
Sarra, Lídia
Torres, Jordi
Article History
Received: 14 March 2017
Revised: 2 May 2017
Accepted: 9 May 2017
First Online: 19 May 2017
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.