Funding for this research was provided by:
National Founds from FCT – Foundation for Science and Technology (PEst-OE/SADG/UI0283/2015)
Article History
Received: 18 December 2017
Revised: 8 February 2018
Accepted: 19 February 2018
First Online: 3 March 2018
Compliance with ethical standards
: Informed written consent from each participant was obtained in accordance with the principles expressed in the Declaration of Helsinki guidelines for human subjects. The current study was reviewed and approved by the Ethical Committee of the University Fernando Pessoa (Oporto, Portugal). 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.
: The authors declare that they have no conflict of interest.
: Informed consent was obtained from all individual participants included in the study.