1. Unit of Endocrinology and Metabolic Diseases University of Campania "L. Vanvitelli" Naples Italy
2. Clinic for Nuclear Medicine and Competence Thyroid Centre Imaging Institute of Southern Switzerland Bellinzona Switzerland
3. Institute of Laboratory Medicine Ente Ospedaliero Cantonale Bellinzona Switzerland
4. Division of Nuclear Medicine Ente Ospedaliero Galliera Genova Italy
5. Clinic for Nuclear Medicine University Hospital and University of Zurich Zurich Switzerland