1. Clinical Hospital of Porto Alegre of Federal University of Rio Grande do Sul (HCPA/UFRGS), Porto Alegre, RS, Brazil
2. Federal University of Rio Grande (FURG), Rio Grande, RS, Brazil
3. Science and Education Faculty Sena Aires (FACESA), Valparaíso de Goiás, GO, Brazil
4. Faculty of Medicine, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil
5. HCPA/UFRGS, Porto Alegre, RS, Brazil