1. The Emergency and Intensive Care Center; Fuwai Hospital; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing China
2. Department of Cardiology; Fu Xing Hospital; Capital Medical University; Beijing China
3. Department of Cardiology; Pingdu People's Hospital; Pingdu Shandong China
4. Department of Emergency; Qingdao Municipal Hospital; Qingdao Shandong China
5. Department of Emergency; West China Hospital; Sichuan University; Chengdu Sichuan China
6. Department of Emergency; Sixth People's Hospital of Chengdu; Chengdu Sichuan China