1. Department of Surgery, Federal University of Pernambuco (UFPE), Recife, Brazil.
2. Nutrition School, Federal University of Pernambuco (UFPE), Recife, Brazil.
3. Medical School, Federal University of Pernambuco (UFPE), Recife, Brazil.
4. Nutrition School, Faculdade Pernambucana de Saúde, Recife, Brazil.
5. General Surgery Division, Hospital das Clínicas at Federal University of Pernambuco (HC/UFPE), Recife, Brazil.