1. Division of Endocrinology, Department of Medicine Vagelos College of Physicians and Surgeons, Columbia University New York NY USA
2. Division of Endocrinology and Metabolism McMaster University Hamilton Canada
3. Division of Endocrinology, Diabetes, Metabolism, and Nutrition Mayo Clinic Rochester MN USA
4. Endocrine Unit, Department of Medicine Massachusetts General Hospital and Harvard Medical School Boston MA USA
5. Fondazione Italiana sulla Ricerca sulle Malattie dell'Osso (FIRMO Foundation) Florence Italy