1. Department of Gastrointestinal Surgery, Gastrointestinal Oncology, & Bariatric Surgery, Medanta Institute of Digestive & Hepatobiliary Sciences, Medanta, The Medicity, Gurgaon, India
2. Hepatobiliary & Oesophagogastric Unit, Division of Surgery & Perioperative Medicine, Flinders Medical Center, Bedford Park, Adelaide, South Australia, Australia
3. School of Medicine, Faculty of Medicine, Nursing & Health Sciences, Flinders University, Adelaide, South Australia, Australia
4. Department of Clinical Research, Medanta, The Medicity, Gurgaon, India