1. National Fire Agency Pre-hospital Emergency Medical Research TF, Sejong, Korea.
2. National Emergency Medical Center, National Medical Center, Seoul, Korea.
3. Department of Emergency Medicine, Seoul National University Hospital, Seoul, Korea.
4. Department of Emergency Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
5. ARPI Inc., Seongnam, Korea.
6. Division of Cardiology, Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.