1Department of Emergency Medicine, Yonsei University College of Medicine, Korea. emstar@yuhs.ac
2Department of Emergency Medicine, Hanyang University, Korea.
3Department of Emergency Medicine, Chungnam National University Hospital, Korea.
4Department of Emergency Medicine, Chung-Ang University, Korea.
5Department of Emergency Medicine, Inje University College of Medicine, Korea.
6Department of Emergency Medicine, Samsung Medical Center, Korea.
7Department of Emergency Medicine, Soonchunhyang University Hospital, Korea.
8Department of Emergency Medicine, Kangdong Sacred Heart Hospital, Korea.
9Department of Emergency Medicine, Bestian Hospital, Korea.