1. Unit of Endocrinology, Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
2. Unit of Nuclear Medicine, Department of Biomedical and Dental Sciences and Morpho-Functional Imaging, University of Messina, Messina, Italy
3. Department of Nuclear Medicine, Nuclear Medicine Division, AOU Città Della Salute E Della Scienza, University of Turin, Turin, Italy
4. Endocrinology Unit, S. Giorgio Hospital, Pordenone, Italy
5. Department of Oncology and Nuclear Medicine, University Hospital Center “Sestre Milosrdnice”, Zagreb, Croatia
6. Clinic for Nuclear Medicine and Competence Centre for Thyroid Diseases, Imaging Institute of Southern Switzerland, Ente Ospedaliero Cantonale, Bellinzona, Switzerland