1. Postgraduate Program in Health Sciences, Faculty of Medicine, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
2. Extension Program of the Faculty of Medicine, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
3. Study Group of Chagas Disease, Hospital das Clínicas, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
4. Department of Surgery, Faculty of Medicine, Universidade Federal de Goiás, Goiânia, Goiás, Brazil