1. Academic Center for Thyroid Diseases, Department of Internal Medicine , Erasmus Medical Center , Rotterdam , The Netherlands
2. Department of Internal Medicine , Maasstad Hospital , Rotterdam , The Netherlands
3. Department of Clinical Chemistry , Erasmus Medical Center , Rotterdam , The Netherlands
4. Department of Nuclear Medicine , Erasmus Medical Center , Rotterdam , The Netherlands
5. Academic Center for Thyroid Diseases, Department of Surgery , Erasmus Medical Center , Rotterdam , The Netherlands