1. Tianjin Medical University, Tianjin, China
2. Department of Intensive medicine, Kailuan General Hospital, Tangshan, China
3. Key Laboratory of Emergency and Disaster Medicine in Chinese People's Liberation Army, Institute of Disaster Medicine and Public Health, Affiliated Hospital of Logistics University of Chinese People's Army Police Forces, Tianjin, China
4. Department of Cardiology, Affiliated Hospital of North China University of Science and Technology, Tangshan, China
5. Department of Cardiology, Tangshan Workers’ Hospital, Tangshan, China
6. Department of Cardiology, Kailuan General Hospital, Tangshan, China