1. Department of Endocrinology and Metabolism, Pituitary Unit, Fondazione Policlinico Universitario A. Gemelli, IRCCS , Rome 00168 , Italy
2. Dipartimento di Medicina e Chirurgia Traslazionale, Università Cattolica del Sacro Cuore , Rome 00168 , Italy
3. Institute of Endocrine and Metabolic Sciences, Università Vita-Salute San Raffaele, IRCCS Ospedale San Raffaele , Milan 20132 , Italy
4. Department of Medical Sciences, Section of Endocrinology, Geriatrics & Internal Medicine, University of Ferrara , Ferrara 44121 , Italy