Article History
Received: 6 July 2017
Accepted: 31 May 2018
First Online: 7 June 2018
Compliance with ethical standards
:
: The authors declare no conflict of interest.
: All procedures performed in this study involving human participants were in accordance with the ethical standards of the Coimbra University Hospital (CHUC) 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.