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