1 Department of Emergency Medicine, Chungnam National University Hospital, 282, Munhwa-ro, Jung-gu, Daejeon, Republic of Korea; Department of Emergency Medicine, College of Medicine, Chungnam National University School of Medicine, 282, Mokdong-ro, Jung-gu, Daejeon, Republic of Korea.
2 Department of Emergency Medicine, Chungnam National University Hospital, 282, Munhwa-ro, Jung-gu, Daejeon, Republic of Korea.
3 Department of Emergency Medicine, Chungnam National University Hospital, 282, Munhwa-ro, Jung-gu, Daejeon, Republic of Korea; Department of Emergency Medicine, College of Medicine, Chungnam National University School of Medicine, 282, Mokdong-ro, Jung-gu, Daejeon, Republic of Korea. Electronic address: cpcr@cnu.ac.kr.