Internal Medicine Unit 3, Careggi University Hospital, Florence, Italy. Department of Experimental and Clinical Medicine, University of Florence, Careggi University Hospital, Florence, Italy. Pituitary Diseases and Sodium Alterations Unit, Endocrinology, Careggi University Hospital, Florence, Italy. Endocrinology, Department of Experimental and Clinical Biomedical Sciences "Mario Serio", University of Florence, Careggi University Hospital, 50139, Florence, Italy. Consorzio I.N.B.B., 00136, Rome, Italy. Pituitary Diseases and Sodium Alterations Unit, Endocrinology, Careggi University Hospital, Florence, Italy. alessandro.peri@unifi.it. Endocrinology, Department of Experimental and Clinical Biomedical Sciences "Mario Serio", University of Florence, Careggi University Hospital, 50139, Florence, Italy. alessandro.peri@unifi.it.