1 Department of Emergency Medicine, Mackay Memorial Hospital, Taipei, Taiwan.
2 Department of Linguistics, Indiana University, Bloomington, IN, USA.
3 Department of Emergency Medicine, Mackay Memorial Hospital, Taipei, Taiwan; Prehospital Emergency Care Center, Mackay Memorial Hospital, Taipei, Taiwan.
4 Department of Emergency Medicine, Seoul National University College of Medicine and Hospital, Seoul, South Korea.
5 Faculty of Medicine, Universiti Teknologi MARA, Shah Alam, Malaysia.
6 Department of Emergency Medicine, National Taiwan University Hospital, Yunlin Branch, Douliu City, Taiwan; Department of Emergency Medicine, National Taiwan University Hospital, Taipei, Taiwan. Electronic address: drchiang.tw@gmail.com.