1. Health Science postgraduate program, Medical School, Universidade Federal de Goiás, Goiânia, Brazil
2. Endocrinology Unit, Thyroid Department, Goiânia General Hospital, Goiânia, Brazil
3. Department of Radiology at Clinical Hospital, Universidade Federal de Goiás, Goiânia, Brazil
4. Thyroid Department, Brazilian Thyroid Institute, São Paulo, Brazil