^○Jung-In Ko¹, Kyung Su Kim¹, Gil Joon Suh^1,4, Woon Yong Kwon^1,4, Taegyun Kim¹, Kyuseok Kim^2,4, Jonghwan Shin^3,4, You Hwan Jo^2,4 (1. Department of Emergency Medicine, Seoul National University Hospital, 2. Departmentof Emergency Medicine, Seoul National University Bundang Hospital, 3. Department of Emergency Medicine, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, 4. Department of Emergency Medicine, College of Medicine, Seoul National University)

^○Jumpei Tsukuda, Yasuhiko Taira, Kentaro Okamoto, Takeshi Kawaguchi, Takaki Naito, Nobuhiko Simozawa, Kenichiro Morisawa, Shigeki fujitani (Emergency and critical care medicine, St. Marianna University School of Medicine)

^○Jung Hyun Lee, Youngok Kwon, Kyung Su Kim, Ga Young Um, Yoon Ah Woo, Ji Hyun Kim, Bo Ram Oh, Eun JinKim, Pyoeng Gyun Choe, Eun- Hee Jung (Seoul National University Hospital)

^○Sung Yoon Lim¹, Seung-Hye Choi², Yeon Joo Lee¹, Ho Il Yoon¹, Jae Ho Lee¹, Choon-Taek Lee¹, Young-Jae Cho¹ (1.Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National UniversityBundang Hospital, 2. Department of Nursing, Semyung University)

^○Sun Ha Choi, Soo Yeon Kim, In Suk Sol, Yoon Hee Kim, Kyung Won Kim, Myung Hyun Sohn (Department of Pediatrics, Institute of Allergy, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine)

^○Won-Il Choi (Keimyung University Dongsan Hospital)

^○Nobuhiro Shiota, Sachiyo Sato, Kenji Wakabayashi, Marie Tanaka, Yoko Tsukada, Mizuho Asada, Hidenobu Shigemitsu (Department of Critical Care Medicine, Tokyo Medical and Dental University)