1. Universidade Federal de São Paulo; Emergency Medicine and Evidence Based Medicine; Rua Borges Lagoa 564 cj 64 Vl. Clementino São Paulo São Paulo Brazil 04038-000
2. Universidade Federal de São Paulo; Department of Surgery; São Paulo Brazil
3. Universidade Federal de São Paulo (UNIFESP); Department of Surgery; Rua Botucatu 591 14o floor Sao Paulo Sao Paulo SP Brazil 04023062