Article History
Received: 29 November 2018
Accepted: 18 December 2018
First Online: 7 January 2019
Compliance with Ethical Standards
:
: João Vidal Carvalho declares that has no conflict of interest. Álvaro Rocha declares that has no conflict of interest. António Abreu declares that has no conflict of interest.This article does not contain any studies with animals performed by any of the authors.
: Informed consent was obtained from all individual participants included in the study.