[1] Chung Ang Univ, Coll Med, Dept Emergency Med, 84 Heukseok Ro, Seoul 06974, South Korea
[2] Chung Ang Univ Gwangmyeong Hosp, Emergency Med, 110 Deokan Ro, Gwangmyeong 14353, Gyeonggi Do, South Korea
[3] Chung Ang Univ, Coll Business & Econ, Dept Advertising & Publ Relat, 84 HeukSeok Ro, Seoul 06974, South Korea
[4] Chung Ang Univ, Coll Med, Dept Emergency Med, 84 Heukseok Ro, Seoul 06974, South Korea
[5] Chung Ang Univ Hosp, Emergency Med, 102 Heukseok ro, Seoul 06973, South Korea