Istituto di Ricerche Farmacologiche Mario Negri IRCCS - Laboratory of Methodology of Systematic Reviews and Guidelines Production, University of Padua - Department of Medicine, University of Padua - Department of Medicine, University of Padua - Bariatric Unit, Scientific Committee of the Italian Association of Clinical Endocrinologists, Sapienza University of Rome - Department of Medical-Surgical Science and Translational Medicine, National Institute of Gastroenterology Saverio de Bellis - Unit of Geriatrics and Internal Medicine, Niguarda Ca' Granda Hospital - Diabetology Unit, Istituto di Ricerche Farmacologiche Mario Negri IRCCS - Laboratory of Methodology of Systematic Reviews and Guidelines Production, Sta. Maria Hospital - Diabetology, Dietetics and Clinical Nutrition Unit, Istituto di Ricerche Farmacologiche Mario Negri IRCCS - Laboratory of Methodology of Systematic Reviews and Guidelines Production, Italian College of General Practitioners and Primary Care, Istituto di Ricerche Farmacologiche Mario Negri IRCCS - Laboratory of Methodology of Systematic Reviews and Guidelines Production, Istituto di Ricerche Farmacologiche Mario Negri IRCCS - Laboratory of Methodology of Systematic Reviews and Guidelines Production, University of Milan, Faculty of Medicine, Department of Medical Biotechnology and Translational Medicine, Center for Study and Research on Obesity, Catholic University of the Sacred Heart, Rome - Endocrinology and Metabolism, ULSS6 Euganea - Endocrinology, Ospedale Regina Apostolorum - Endocrinology, Italian Ministry of the Interior - Department of Firefighters, Public Rescue and Civil Defense, Catholic University of the Sacred Heart, Rome - Centro di Ricerca in Chirurgia delle Ghiandole Endocrine e dell'Obesità, ASL Novara - Endocrinology, Ospedale Santo Spirito, Rome - Endocrinology, Istituto di Ricerche Farmacologiche Mario Negri IRCCS - Laboratory of Methodology of Systematic Reviews and Guidelines Production, Sant'Anna Hospital, ASST Lariana - Center for Study, Diagnosis and Treatment of Obesity and Ospedale Regina Apostolorum - Endocrinology