1. Coloproctology Department, Hospital de Base do Distrito Federal, Brasília, Brazil;
2. Department of Health Sciences, Brasília University, Brasília, Brazil;
3. Nuclear Medicine Department, Hospital de Base do Distrito Federal, Brasília, Brazil;
4. Rheumatology Department, Hospital de Base do Distrito Federal, Brasília, Brazil;
5. Pathology Department, Hospital de Base do Distrito Federal, Brasília, Brazil