^○Young-Rock Ha, Young-Geun Lee, Jung-Hwan Ahnn (Department of Emergency Medicine, Bundang Jesaeng Hospital, Korea)

^○Tae-Yop Kim¹, Gayon Yu¹, Eugene Jung¹, Nazri Muhammad¹, Woon-Seok Kang¹, Yoon Hee Kim² (1. Department of Anesthesiology, Konkuk University Medical Center, Korea, 2. Department of Anesthesiology, Chungnam National University Hospital, Korea)

^○Jin Jeon¹, Younsuck Koh², Chae-Man Lim², Sang-Bum Hong² (1. Department of Intensive Care Medicine, Asan Medical Center, Korea, 2. Department of Pulmonology & Intensive Care Medicine, Asan Medical Center, Korea)

^○Masatake Kobayashi¹, Kunihiko Teraoka², Yoichi Iwasaki², Masataka Watanabe¹, Kenji Takazawa², Akira Yamashina¹ (1. The Department of Cardiology, Tokyo Medical University, Tokyo, Japan, 2. The Department of Cardiology, Tokyo Medical University Hachioji Medical Center, Tokyo, Japan)

^○Seok-Chan Kim, Hwa-Young Lee, Hye-Sun Kang, Chin Kook Lee (Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul St. Mary’s Hospital, The Catholic University of Korea, College of Medicine, Seoul, Korea)

^○Won Young Kim (Department of Emergency Medicine, Asan Medical Center, Seoul, Korea)

^○Yun Seong Kim, Dong Wan Kim, Woo Hyun Cho, Doo Soo Jeon, Seong Hoon Yoon, Hye Ju Yeo, Bong Soo Son, Do Hyung Kim (Department of Internal Medicine, Pusan National University Yangsan Hospital, Korea)

^○Jung Won Kim, Jun Hyun Kim (Department of Anesthesiology and Pain Medicine, Ilsan Paik Hospital, Korea)

^○Hannah Lee, Hogeol Ryu, Jae-Woo Ju (Department of Anesthesia and Pain Medicine, Seoul National UniversityHospital, Korea)

^○Chi Ryang Chung¹, Young Jun Ko², Kyeongman Jeon³, Chi Min Park⁴, Jeong Hoon Yang^{5, 6}, Gee Young Suh³ (1. Department of Critcal Care Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine,Seoul, Korea, 2. Department of Physical and Rehabilitation Medicine, Samsung Medical Center, Korea, 3. Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea, 4. Department of Critical Care Medicine, Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea, 5. Division of Cardiology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea, 6. Division of Cardiology, Department of Critical Care Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea)

^○Seung Whan Kim (Department of Emergency Medicine, College of Medicine, Chungnam National University, Daejeon, Korea)

^○Jeong-Moo Lee¹, Ho Geol Ryu², Hannah Lee² (1.Department of Surgery, Seoul National University College of Medicine, Seoul, Korea, 2. Department of Anesthesiology, Seoul National University College of Medicine, Seoul, Korea)

^○Soonyoung Park¹, Dong Hyun Lee¹, Younsuck Koh², Chae-Man Lim², Jin Won Huh^{2, Sang-Bum Hong2} (1. Department of Critical Care Medicine, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea, 2. Department of Pulmonary and Critical Care Medicine, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea)

^○Young-Jae Cho¹, Hyun Woo Lee¹, Jinsoo Min¹, Jisoo Park¹, Yeon Joo Lee¹, Sangheon Park², Seung-Hye Choi³, Jee Young Kim¹, Eun Young Lee⁴ (1. Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Korea, 2. Department of Anesthesiology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Korea, 3. Department of Nursing Science, Suwon University, Korea, 4. Interdepartment of Critical Care Medicine, Seoul National University Bundang Hospital, Korea)