1. Department of Internal Medicine and Medical Disciplines; Sapienza University of Rome; Rome Italy
2. Department of Medicine; Division of Endocrinology; Santa Casa de Belo Horizonte, and Felicio Rocho Hospital; Belo Horizonte Brazil
3. Metabolic Bone Diseases Unit; Division of Endocrinology; Department of Medicine; College of Physician and Surgeons; Columbia University; New York NY USA
4. Division of Endocrinology; Department of Medicine; Lenox Hill Hospital; New York NY USA
5. Faculty of Economics; UNINT University; Rome Italy
6. Department of Radiology; Sapienza University of Rome; Rome Italy
7. Center of Bone Diseases; Lausanne University Hospital; Lausanne Switzerland