1. Monash University Department of Surgery, Central Clinical School Alfred Health Melbourne Victoria Australia
2. Oesophago‐Gastric and Bariatric Unit Alfred Health Melbourne Victoria Australia
3. Department of Anaesthesiology and Perioperative Medicine Alfred Health Melbourne Victoria Australia
4. Monash University, School of Public Health and Preventive Medicine Bariatric Surgery Registry Melbourne Victoria Australia
5. Department of Surgery University of Auckland Auckland New Zealand
6. Boden Initiative, Charles Perkins Centre University of Sydney Sydney New South Wales Australia
7. Department of Endocrinology Royal Prince Alfred Hospital Sydney New South Wales Australia