Clinical & Biomedical Research; Vol. 40 No. 2 (2020) Clinical and Biomedical Research; v. 40 n. 2 (2020) Repositório Institucional da UFRGS Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS Clinical and Biomedical Research, Vol 40, Iss 2 (2021) Clinical and Biomedical Research