Funding for this research was provided by:
Fundação para a Ciência e a Tecnologia (UID/CTM/00264/2019)
Article History
Received: 31 July 2019
Accepted: 22 January 2020
First Online: 31 January 2020
Compliance with ethical standards
:
: The authors declare that they have no competing interests.
Free to read: This content has been made available to all.