Shandong University - Department of Emergency Medicine and Chest Pain Center, University of Electronic Science and Technology of China (UESTC) - Emergency Medical Center, Shandong University - Department of Emergency Medicine and Chest Pain Center, Government of the People's Republic of China - China-Japan Friendship Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Fuwai Hospital, Chongqing Medical University - Department of Emergency and Intensive Care Unit, Hunan Children's Hospital - Pediatric Intensive Care Unit 2, Guangxi Medical University - Department of Emergency, Hunan Normal University - Hunan Provincial Institute of Emergency Medicine, Government of the People's Republic of China - China-Japan Friendship Hospital, Shandong University - Department of Emergency Medicine and Chest Pain Center, Shandong University - Department of Emergency Medicine and Chest Pain Center, Shandong University - Department of Emergency Medicine and Chest Pain Center, Shandong University - Department of Emergency Medicine and Chest Pain Center, Shandong University - Department of Emergency Medicine and Chest Pain Center, Shandong University - Department of Emergency Medicine and Chest Pain Center, Shandong University - Department of Emergency Medicine and Chest Pain Center, Shandong University - Department of Emergency Medicine and Chest Pain Center, Shandong University - Department of Emergency Medicine and Chest Pain Center, Shandong University - Department of Emergency Medicine and Chest Pain Center, Shandong University - Department of Emergency Medicine and Chest Pain Center, Shandong University - Department of Emergency Medicine and Chest Pain Center, Emory University, National University of Singapore (NUS) - Health Services and Systems Research, Shandong University - Department of Emergency Medicine and Chest Pain Center, Shandong University - Department of Emergency Medicine and Chest Pain Center and Independent