1. Endocrinology Unit, Niguarda Hospital (R.A., R.C.), I-20162 Milan, Italy;
2. Endocrinology Chair, Department of Clinical Sciences, University of Rome La Sapienza (R.B., G.T.), 00161 Rome, Italy;
3. Department of Molecular and Clinical Endocrinology and Oncology, University of Naples Federico II (R.P., A.C.), 80131 Naples, Italy;
4. Division of Endocrinology and Metabolism, University of Turin (S.G., V.G.), 10126 Turin, Italy;
5. DISEM, University of Genoa (L.B., M.G.), 16132 Genoa, Italy