1 Department of Emergency Medicine, Far Eastern Memorial Hospital, New Taipei City, Taiwan.
2 Department of Emergency Medicine, National Taiwan University Hospital Hsin-Chu Branch, Hsin-Chu City, Taiwan; Institute of Health Policy and Management, College of Public Health, National Taiwan University, Taipei, Taiwan.
3 Department of Emergency Medicine, National Taiwan University Hospital, Taipei, Taiwan.
4 Department of Emergency Medicine, National Taiwan University Hospital, Taipei, Taiwan; Department of Emergency Medicine, National Taiwan University Hospital Yun-Lin Branch, Douliu City, Taiwan.