1. Division of Surgery, Istituto Auxologico Italiano, IRCCS Capitanio, Milan, Italy.
2. Division of Surgery, IRCCS Istituto Auxologico Italiano Milan, University of Milan, Bicocca, Italy.
3. Department of Surgical Sciences, University of Rome “Tor Vergata,” Rome, Italy.
4. Division of General, Minimally Invasive and Robotic Surgery, University of Illinois at Chicago, Chicago, Illinois, USA.
5. Department of Surgery, Ioannina University Hospital, Ioannina, Greece.
6. Obesity Unit and Laboratory of Nutrition and Obesity Research, Department of Endocrine and Metabolic Diseases, IRCCS Istituto Auxologico Italiano, University of Milan, Milan, Italy.
7. Division of Surgery, Endocrine Surgery Unit, Istituto Auxologico Italiano, IRCCS Capitanio, University of Milan, Milano, Italy.