1. Department of Nuclear Medicine and Thyroid Center; Oncology Institute of Southern Switzerland; Bellinzona Switzerland
2. Section of Endocrinology and Diabetology; Ospedale Israelitico; Rome Italy
3. Department of Nuclear Medicine; RWTH University Hospital Aachen; Aachen Germany
4. Thyroid Committee; European Association of Nuclear Medicine; Vienna Austria
5. Department of Nuclear Medicine; UKGM University Hospital Marburg; Marburg Germany