1. Department of Surgery; University Hospital Prof. Alberto Antunes (Federal University of Alagoas); Maceio Brazil
2. Emergency Medicine and Evidence Based Medicine; Universidade Federal de São Paulo; São Paulo Brazil
3. Evidence Based Medicine, Cochrane Brazil; Universidade Federal de São Paulo; São Paulo Brazil
4. Department of Surgery, Division of Vascular and Endovascular Surgery; Universidade Federal de São Paulo; São Paulo Brazil