1. Department of Emergency Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
2. Department of Biomedical Engineering, Asan Medical Institute of Convergence Science and Technology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
3. Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
4. National Emergency Medical Center, Seoul, Korea.
5. Department of Convergence Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
6. UCSD Health Department of Biomedical Informatics, University of California San Diego, La Jolla, CA, USA.