1. Department of Physiology, Biosciences Institute, University of Sao Paulo, São Paulo 05508
2. Division of Endocrinology, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston 02215
3. Thyroid Division, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts 02115
4. Department of Histology and Embryology, Institute of Biomedical Sciences, University of São Paulo, São Paulo 05508, Brazil