1. Federal University of Rio Grande do Sul, Brazil; Hospital de Clínicas de Porto Alegre, Brasil
2. Federal University of Rio Grande do Sul, Brazil; Universidade Franciscana, Brasil; Federal University of Santa Maria, Brazil
3. Hospital de Clínicas de Porto Alegre, Brasil
4. Hospital de Clínicas de Porto Alegre, Brasil; Federal University of Rio Grande do Sul, Brazil
5. Federal University of Rio Grande do Sul, Brazil; Hospital de Clínicas de Porto Alegre, Brasil; Federal University of Rio Grande do Sul, Brazil