1. Unit of Endocrinology, Department of Translational Medicine and Surgery - Universita' Cattolica del Sacro Cuore, Fondazione Policlinico ”Gemelli”, IRCCS, Rome, Italy
2. Unit of Chemistry, Biochemistry and Clinical Molecular Biology - Università Cattolica Del Sacro Cuore, Fondazione Policlinico “Gemelli,” IRCCS, Rome, Italy
3. UniCamillus-Saint Camillus International University of Health Sciences, Rome, Italy
4. Division of Endocrinology Diabetes and Metabolism and Pituitary Center, Johns Hopkins University, Baltimore MD, USA