1 Emergency Medicine Department, National University Hospital, National University Health System, Singapore; Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Centre for Quantitative Medicine, Duke-NUS Graduate Medicine School, Singapore.
2 Emergency Medicine Department, National University Hospital, National University Health System, Singapore; Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
3 Centre for Quantitative Medicine, Duke-NUS Graduate Medicine School, Singapore.