Colomer, Carlota
Margalef, Pol
Gonzalez, Jessica
Vert, Anna
Bigas, Anna
Espinosa, Lluis
Article History
Received: 2 August 2017
Revised: 22 November 2017
Accepted: 22 November 2017
First Online: 13 February 2018
Change Date: 20 March 2018
Change Type: Update
Change Details: This paper was modified 12 months after initial publication to switch to Creative Commons licence terms, as noted at publication
Competing interests
: The authors declare no conflict of interest.