1. Department of Medicine, Federal University of Santa Maria, Santa Maria (RS), Brazil
2. Department of Medicine, University of Iguaçu, Nova Iguaçu (RJ), Brazil
3. Department of Medicine, University of West São Paulo, Presidente Prudente (SP), Brazil
4. Department of Medicine, Federal University of Piauí, Teresina (PI), Brazil
5. Department of Medicine, Federal University of Grande Dourados, Dourados (MG), Brazil
6. Department of Medicine, State University of Mato Grosso do Sul, State Hospital of Mato Grosso do Sul (MS), Brazil