Funding for this research was provided by:
Fundação para a Ciência e a Tecnologia (SFRH/BPD/70063/2010)
Text and Data Mining valid from 2018-10-17
First Online: 17 October 2018
Compliance with Ethical Standards
: 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.
: Author Helena Moreira declares that she has no conflict of interest. Author Berta Maia declares that she has no conflict of interest.