1. Department of Emergency Medicine, West China Hospital, Sichuan University, Chengdu, China
2. Department of Emergency Medicine, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
3. Department of Emergency Medicine, Mianyang Central Hospital, Mianyang, China
4. Department of Emergency Medicine, Affiliated Hospital of Luzhou Medical College, Luzhou, China
5. Department of Emergency Medicine, Zigong No. 4 People's Hospital, Zigong, China
6. Department of Cardiology, West China Hospital, Sichuan University, Chengdu, China