Clinical practice of emergency department-initiated extracorporeal cardiopulmonary resuscitation for cardiac arrest in adults. Issue 2 (20th February 2023) - Xu, Guowu; Wang, Jinxiang; Zhou, Wenjing; Jin, Heng; Chai, Yanfen; Fan, Haojun; Hou, Shike; Liu, Ziquan; Liu, Yanqing