1 Department of Family Medicine and Community Health, Duke University School of Medicine, Durham, NC, USA; Department of Population Health Sciences, Duke University School of Medicine, Durham, NC, USA; Department of Health Services and Systems Research, Duke-NUS Medical School, Singapore, Singapore. Electronic address: audrey.blewer@duke.edu.
2 Department of Emergency Medicine, Singapore General Hospital, Singapore, Singapore; Prehospital and Emergency Centre Research, Duke-NUS Medical School, Singapore, Singapore.