1. Department of Experimental, Diagnostic and Specialty Medicine (DIMES) and Interdepartmental Centre “L. Galvani” (CIG), University of Bologna, 40126 Bologna, Italy
2. Department of Clinical Sciences and Community Health (DISCCO), University of Milan, 20122 Milan, Italy
3. Laboratory of Endocrine and Metabolic Research, IRCCS Istituto Auxologico Italiano, Cusano Milanino (MI) 20095, Italy
4. Geriatric Unit, Fondazione Ca' Granda, IRCCS Ospedale Maggiore Policlinico, 20122 Milan, Italy
5. Department of Pathobiology and Medical and Forensic Biotechnologies, University of Palermo, 90134 Palermo, Italy
6. Department of Clinical and Experimental Medicine, University of Parma, 43126 Parma, Italy
7. Endocrinology Unit, and Department of Medical and Surgical Sciences and Center for Applied Biomedical Sciences, St Orsola-Malpighi Hospital, University of Bologna, 40138 Bologna, Italy
8. Department of Statistical Sciences “Paolo Fortunati”, University of Bologna, 40126 Bologna, Italy
9. Department of Clinical, Experimental and Biomedical Sciences, University of Florence, 50134 Florence, Italy