1. Endocrinology Unit, Azienda Ospedaliero-Universitaria Careggi, Largo Brambilla 3, 50134 Florence, Italy
2. Department of Clinical Pathophysiology, University of Florence, Viale Pieraccini 6, 50139 Florence, Italy
3. Istituto Toscano Tumori, Via Taddeo Alderotti 26N, 50139 Florence, Italy