Shandong University - Department of Emergency Medicine and Chest Pain Center, Peking University - Peking University Third Hospital, Government of the People's Republic of China - Chinese PLA General Hospital, Peking University - Peking University First Hospital, Department of Emergency, Huaxi 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 UniversityDepartment of Emergency and Chest Pain Center, Chinese Ministry of Education and Chinese Ministry of Public Health, 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, University of South Australia, Shandong University - Department of Emergency Medicine and Chest Pain Center and Independent

Shandong University, Shandong University, Shandong University - Department of Epidemiology, Shandong University, Shandong University, affiliation not provided to SSRN, affiliation not provided to SSRN, 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 Epidemiology, Shandong University - Department of Emergency Medicine and Chest Pain Center, Shandong University - Department of Emergency Medicine and Chest Pain Center and Shandong University