1. Department of Emergency Medicine, College of Medicine, Chung-Ang University, Chung-Ang University Hospital, 224-1 Heoukseok-dong, Dongjak-gu, Seoul 156-757, Republic of Korea
2. Department of Internal Medicine, College of Medicine, Chung-Ang University, Chung-Ang University Hospital, 224-1 Heoukseok-dong, Dongjak-gu, Seoul 156-757, Republic of Korea
3. Chung-Ang Institute for Simulation, Education, and Research, College of Medicine, Chung-Ang University, Chung-Ang University Hospital, 224-1 Heoukseok-dong, Dongjak-gu, Seoul 156-757, Republic of Korea
4. Medical Education of Clinical Medicine, College of Medicine, Chung-Ang University, Chung-Ang University Hospital, 224-1 Heoukseok-dong, Dongjak-gu, Seoul 156-757, Republic of Korea
5. School of Computer Science and Engineering, Chung-Ang University, 224 Heoukseok-dong, Dongjak-gu, Seoul 156-756, Republic of Korea
6. Graduate School, College of Medicine, Chung-Ang University, 224 Heoukseok-dong, Dongjak-gu, Seoul 156-756, Republic of Korea