1. Department of Emergency Medicine, School of Medicine, Kyungpook National University, Daegu, Republic of Korea;
2. Department of Emergency Medicine, Dongguk University Ilsan Hospital, College of Medicine, Dongguk University, Seoul, Republic of Korea;
3. Division of Critical Care and Disaster Medicine, Department of Emergency Medicine, Dongguk University College of Medicine, Dongguk University Gyeongju Hospital, Gyeongju, Republic of Korea