1. Department of Cardiology, The Second Affiliated Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China (mainland)
2. Department of Cardiology, Tianjin Medical University General Hospital, Tianjin, China (mainland)
3. Department of Preventive Medicine, Changzhi Medical College, Changzhi, Shanxi, China (mainland)
4. Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha, Hunan, China (mainland)