1. Department of Cardiology Dalian Municipal Central Hospital Dalian Liaoning China
2. Department of Chronic Disease Disease Control and Prevention of Chaoyang City Chaoyang Liaoning China
3. Department of Chronic Disease Disease Control and Prevention of Dandong City Dandong Liaoning China
4. Department of Chronic Disease Disease Control and Prevention of Liaoyang City Liaoyang Liaoning China
5. Department of Ultrasound The Fourth Hospital of China Medical University Shenyang Liaoning China