Funding for this research was provided by:
Fundação para a Ciência e a Tecnologia (SFRH/BPD/86666/2012)
First Online: 24 May 2019
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: “All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.”On behalf of all authors, the corresponding author states that there is no conflict of interest.