1. Department of Emergency Medicine, College of Medicine, Chung-Ang University, Seoul, Republic of Korea
2. Department of Emergency Medicine, Hanyang University College of Medicine, Seoul, Republic of Korea
3. Department of Preventive Medicine, College of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea
4. Department of Emergency Medicine, Hallym University, Kangdong Sacred Heart Hospital, Seoul, Republic of Korea
5. Department of Emergency Medicine, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Republic of Korea
6. Department of Neurosurgery, Hanyang University College of Medicine, Seoul, Republic of Korea
7. Department of Emergency Medicine, College of Medicine, Chung-Ang University Gwangmyeong Hospital, Gyeonggi-do, Republic of Korea
8. Department of Neurosurgery, Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea