Funding for this research was provided by:
Fundação para a Ciência e a Tecnologia (SFRH/BPD/94490/2013, SFRH/BD/104159/2014, SFRH/BD/104182/2014, IF/01219/2014, POCI-01-0145-FEDER-028209)
Text and Data Mining valid from 2019-03-12
Received: 25 October 2018
Accepted: 5 March 2019
First Online: 12 March 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.
: Informed consent was obtained from all individual participants included in the study.