Funding for this research was provided by:
Universitat de Girona (BR-UdG predoctoral fellowship, MPCUdG2016-010)
Article History
Received: 27 October 2017
Accepted: 11 April 2018
First Online: 24 April 2018
Compliance with ethical standards
: The authors declare that no ethics certification was required for this work and that all the research involved in it complies with the guidelines for research projects at the University of Girona and the current laws of the country where the study was performed (Spain).