1. Department of Emergency Medicine, Chonnam National University Hospital, Chonnam National University Medical School, Gwangju, Korea.
2. Department of Emergency Medicine, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea.
3. Department of Emergency Medicine, Yonsei University College of Medicine, Seoul, Korea.
4. Department of Emergency Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
5. Department of Emergency Medicine, Korea University College of Medicine, Seoul, Korea.
6. Department of Emergency Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea.
7. Department of Emergency Medicine, Chung-Ang University, College of Medicine, Seoul, Korea.
8. Department of Emergency Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.