Text and Data Mining valid from 2019-04-02
Received: 20 November 2018
Accepted: 17 March 2019
First Online: 2 April 2019
Compliance with Ethical Standards
: The authors declare that they have no conflicts of interest to disclose. The authors Alberto Caldeira, Kelly Carrión and John Jaulis did not receive financial support for research, authorship and publication of this article.
: All procedures performed during this study involving human participants were in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: For this type of study, formal consent is not required.