Funding for this research was provided by:
Programa Operacional Competitividade e Internacionalização – COMPETE2020 and by National Funds through FCT - Fundação para a Ciência e a Tecnologia (operation POCI-01-0145-FEDER-007746)
Text and Data Mining valid from 2018-03-27
Received: 9 May 2017
Accepted: 18 March 2018
First Online: 27 March 2018
Ethics approval and consent to participate
: Ethical approval was given by the Faculty of Medicine, University of Porto Ethic’s Commission. We performed a retrospective analysis and we processed anonymized information for statistical and research purposes, therefore consent to participate is not applicable in our study [Regulation (EU) 2016/679 of the European Parliament and of the Council on the protection of natural persons with regard to the processing of personal data and on the free movement of such data (approved on April 27, 2016)].
: Consent for publication is not applicable for this work.
: The authors declare that they have no competing interests.
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