1Department of Surgery, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
2Discipline of Anesthesia, Pain and Critical Care Medicine, Federal University of Sāo Paulo, São Paulo, Brazil
3Dietetic Department, Leeds Teaching Hospitals NHS Trust, St James’s University Hospital, Leeds, UK
4Department of Surgery, Groene Hart Hospital, Gouda, Netherlands
5Dutch Obesity Clinic, The Hague, Netherlands
6Department of Upper GI and Bariatric/Metabolic Surgery, North Bristol NHS Trust, Southmead Hospital, Southmead Road, Bristol, UK
7Department of Surgery, University of Turku, Turku, Finland
8Division of Digestive Surgery and Urology, Turku University Hospital, Turku, Finland
9Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA USA
10Department of Anesthesiology, Outcomes Research Institute, Cleveland Clinic, University of Texas Southwestern, Dallas, USA
11Division of Surgery, Department of Clinical Sciences, Danderyd Hospital, Karolinska Institutet, Stockholm, Sweden
12Department of Clinical Sciences, Danderyd Hospital, Karolinska Institutet, Stockholm, Sweden
13Department of Surgery, Ersta Hospital, Stockholm, Sweden