Young-Min Kim, Kyung Woon Jeung, Won Young Kim, Yoo Seok Park, Joo Suk Oh, Yeon Ho You, Dong Hoon Lee, Minjung Kathy Chae, Yoo Jin Jeong, Min Chul Kim, Eun Jin Ha, Kyoung Jin Hwang, Won-Seok Kim, Jae Myung Lee, Kyoung-Chul Cha, Sung Phil Chung, June Dong Park, Han-Suk Kim, Mi Jin Lee, Sang-Hoon Na, Ai-Rhan Ellen Kim, Sung Oh Hwang, on behalf of the Steering Committee of 2020 Korean Guidelines for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care