Clinical & Biomedical Research; Vol. 40 No. 3 (2020) Clinical and Biomedical Research; v. 40 n. 3 (2020) Clinical and Biomedical Research Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS Repositório Institucional da UFRGS Clinical and Biomedical Research, Vol 40, Iss 3 (2021)