1. Leiden University Medical Center; PO Box 9600 C9-43 Leiden Netherlands 2300 RC
2. Leiden University Medical Center; Department of Infectious Diseases; PO Box 9600 C5-P Leiden Netherlands 2300 RC
3. Universidade Federal de São Paulo; Emergency Medicine and Evidence Based Medicine, Brazilian Cochrane Centre; Rua Pedro de Toledo, 598 São Paulo São Paulo Brazil 04039001
4. Universidade Federal de São Paulo; Department of Urology; Rua Doutor Nicolau de Sousa Queiros, 629. Ap.130B São Paulo São Paulo Brazil 04105002