1. Division of General, Oncological, Mini-Invasive and Obesity Surgery, Department of Traslational Medical Sciences, University of Campania “Luigi Vanvitelli”, 80131 Naples, Italy
2. Dieti Department, University of Naples Federico II, 80100 Naples, Italy
3. Division of Hepatobiliary Surgical Oncology, Istituto Nazionale Tumori IRCCS Fondazione Pascale-IRCCS di Napoli, 80131 Naples, Italy
4. Department of Advanced Medical and Surgical Sciences, University of Campania “Luigi Vanvitelli”, 80100 Naples, Italy
5. Division of Endocrinology and Metabolic Diseases, Department of Medical, Surgical, Neurological, Metabolic Sciences and Aging, Second University of Naples, 80138 Naples, Italy
6. Diabetes Unit, Department of Clinical and Experimental Medicine, Second University of Naples, 80138 Naples, Italy