Affiliation: | 1. Ministry of Health Holdings, Singapore;2. Division of Research, Singapore General Hospital, Singapore;3. Emergency Medicine Residency, Singapore Health Services, Singapore;4. Department of Cardiology, National Heart Centre, Singapore;5. Department of Emergency Medicine, Singapore General Hospital, Singapore;6. Department of Respiratory and Critical Care Medicine, Singapore General Hospital, Singapore;g. Health Services and Systems Research, Duke-NUS Medical School, Singapore |