Funding for this research was provided by:
Hospital de Clínicas de Porto Alegre
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Received: 17 July 2019
Accepted: 11 June 2020
First Online: 8 July 2020
Ethics approval and consent to participate
: All participants gave written informed consent and had consented to use of their archived specimens. The study was approved by the research ethics committee of Hospital de Clínicas de Porto Alegre under protocol no. 06–554/2007.
: Not applicable.
: The authors declare that they have no competing interests.