Funding for this research was provided by:
Fundação para a Ciência e a Tecnologia (PD/BD/105822/2014)
Received: 12 February 2018
Accepted: 10 July 2018
First Online: 7 August 2018
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the Ethics Committee of the Nova Medical School, Nova University of Lisbon, 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.
: Not applicable.
: The authors declare that they have no competing interests.
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