S Wijerathne1,2,3,4, D Lomanto5,6,7. 1. Department of General Surgery, National University Health System, Singapore, Republic of Singapore. sujithwijerathne@gmail.com. 2. General Surgery Service, Alexandra Hospital, National University Health System, Singapore, Republic of Singapore. sujithwijerathne@gmail.com. 3. Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Republic of Singapore. sujithwijerathne@gmail.com. 4. Minimally Invasive Surgical Centre, Department of Surgery, National University Hospital, National University Health System (NUHS), Level 8, NUHS Tower Block, 1E Kent Ridge Road 119228, Singapore, Republic of Singapore. sujithwijerathne@gmail.com. 5. Department of General Surgery, National University Health System, Singapore, Republic of Singapore. 6. General Surgery Service, Alexandra Hospital, National University Health System, Singapore, Republic of Singapore. 7. Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Republic of Singapore.