Frasson, Antônio Luiz http://orcid.org/0000-0003-1860-6898
Lichtenfels, Martina
de Souza, Alessandra Anton Borba
Vollbrecht, Betina
Falcone, Ana Beatriz
Frasson, Mônica Adriana Rodriguez Martinez
Barbosa, Fernanda
Article History
Received: 10 December 2019
Accepted: 20 February 2020
First Online: 25 March 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in the study were in accordance with the ethical standards by the Institutional Ethics Committee of Pontifical Catholic University of Rio Grande do Sul (PUCRS), Hospital Albert Einstein and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: For this type of study (retrospective study) formal consent is not required.