F Cetani1, L Torregrossa2, C Marcocci3. 1. Endocrine Unit 2, University Hospital of Pisa, Pisa, Italy. cetani@endoc.med.unipi.it. 2. Department of Surgical, Medical and Molecular Pathology and Critical Area, University of Pisa, Pisa, Italy. 3. Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy.