1 Department of Emergency Medicine, National Taiwan University Hospital, Taipei, Taiwan; Center for Intelligent Healthcare, National Taiwan University Hospital, Taipei, Taiwan.
2 Department of Emergency Medicine, Far Eastern Memorial Hospital, New Taipei City, Taiwan.
3 Department of Medicine, National Taiwan University, Taipei, Taiwan.
4 Department of Emergency Medicine, Far Eastern Memorial Hospital, New Taipei City, Taiwan. Electronic address: yochiahung@gmail.com.
5 Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA.