Received: 27 December 2018
Accepted: 5 June 2019
First Online: 17 June 2019
Ethics approval and consent to participate
: This study was performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. All patients gave their informed consent prior to their inclusion in the study. The study obtained ethical approval from Comitê de Ética em Pesquisa da Fundação Universidade do Amazonas (number 686619), Comitê de Ética em Pesquisa do Hospital de Clínicas de Porto Alegre (number 814431) and Comitê de Ética em Pesquisa da Sociedade Evangélica Beneficiente de Curitiba (number 1013720).
: Not applicable.
: The authors declare that they have no competing interests.