1. Department of Cardiology & National Clinical Research Center of Geriatrics Disease, Chinese PLA General Hospital, Beijing 100853, China
2. Department of Cardiology, Xijing Hospital, Fourth Military Medical University, Xi’an 710032, China
3. Department of Emergency Medicine, Jinling Hospital, Nanjing 210000, China
4. College of Health Sciences, University of Wyoming, Laramie, WY 82071, USA