1. BK21 Graduate Program, Department of Biomedical Sciences, College of Medicine, Korea University, Seoul 02841, Republic of Korea
2. Departments of Emergency Medicine, College of Medicine, Korea University Guro Hospital, Seoul 08308, Republic of Korea
3. Departments of Laboratory Medicine, College of Medicine, Korea University, Seoul 02841, Republic of Korea
4. Departments of Laboratory Medicine, College of Medicine, Korea University Guro Hospital, Seoul 08308, Republic of Korea
5. Departments of Laboratory Medicine, College of Medicine, Korea University Ansan Hospital, Ansan-si 15355, Republic of Korea