1. Department of Laboratory Medicine, University of Ulsan College of Medicine and Asan Medical Center, Seoul, Korea
2. Department of Laboratory Medicine, Pusan National University School of Medicine, Biomedical Research Institute, Pusan National University Hospital, Busan, Korea
3. Department of Emergency Medicine, University of Ulsan College of Medicine and Asan Medical Center, Seoul, Korea
4. Department of Emergency Medicine, Hallym University Medical Center, Anyang, Korea
5. Department of Pulmonology and Critical Care Medicine, University of Ulsan College of Medicine and Asan Medical Center, Seoul, Korea