1. Endocrinology Unit (M.C., I.M., F.G., R.G., E.P.), Rome, Italy
2. Department Of Diagnostic Imaging (G.B., A.B., C.M.P.), Regina Apostolorum Hospital, 00041 Albano Laziale, Rome, Italy
3. Nuclear Medicine Unit (V.T.), and Interventional Radiology, Rome, Italy
4. Endocrinology Division (H.G.), Mayo Clinic College of Medicine, Rochester, Minnesota 55905