1. Department of Emergency Medicine, Korea University Guro Hospital, Seoul, Korea
2. Department of Laboratory Medicine, Korea University Guro Hospital, Seoul, Korea
3. Department of Emergency Medicine, Bundang Jasaeng Hospital, Kyunggi-do, Korea
4. Department of Emergency Medicine, Inje University Ilsan Paik Hospital, Kyunggi-do, Korea
5. Department of Emergency Medicine, Samsung Medical Center, Seoul, Korea