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Authors
Valente, Pedro https://orcid.org/0000-0001-9080-1124
Ferreira, Joana
Pinto, Isabel
Medeiros, Nuno
Oliveira, Pedro
Castro, Eugénia
Condé, Artur
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Article History
Received: 4 January 2020
Accepted: 12 February 2020
First Online: 27 February 2020
Conflicts of interest
: The authors declare that they have no competing interest.
: All the procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. This is a review on retrospective studies which were conducted on already available data for which formal consent was obtained. Therefore, institutional ethical approval is not required according to the law and the national ethical guidelines.
: Informed consent was not obtained from individual participants due the fact that this review included retrospective studies for which formal consent was obtained.
