1. Departments of Endocrinology (E.A., F.C., L.C., E.V., C.B., G.V., A.P., C.M.), University of Pisa, 56124 Pisa, Italy
2. Departments of Psychiatry, of Neurobiology, of Pharmacology and Biotechnology (A.O.), University of Pisa, 56124 Pisa, Italy
3. Departments of Surgery (P.M., P.B.), University of Pisa, 56124 Pisa, Italy
4. Department of Medicine and Pharmacology (J.P.B.), Columbia University, College of Physicians and Surgeons, New York, New York 10032