1. Division of Neurosurgery, Hospital Regina, Novo Hamburgo, Rio Grande do Sul, RS, Brasil
2. Division of Internal Medicine and Infectious Diseases, Hospital Regina, Novo Hamburgo, Rio Grande do Sul, RS, Brasil
3. Division of Pathology, Hospital Regina, Novo Hamburgo, Rio Grande do Sul, RS, Brasil
4. Division of Radiology, Hospital Regina, Novo Hamburgo, Rio Grande do Sul, RS, Brasil