1. General Surgery Service, University of Pernambuco (UPE), Brazil
2. Department of Surgery, Federal University of Pernambuco (UFPE), Brazil
3. Interventional Radiology Service, Clinical Hospital, Federal University of Pernambuco (UFPE), Brazil
4. Pathology Services, Hospital Otávio de Freitas, Brazil
5. University of Pernambuco (UPE), Brazil