Funding for this research was provided by:
Fundação para a Ciência e a Tecnologia (UID/MULTI/04378/2013-POCI/01/0145/FEDER/007728)
Article History
Received: 21 September 2017
Accepted: 2 February 2018
First Online: 13 February 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.