1. Department of Cardiology, Affiliated Hospital of Jining Medical University, Jining, Shandong, China;
2. Shandong University of Traditional Chinese Medicine, Jinan, Shandong, China;
3. Jining Key Laboratory for Diagnosis and Treatment of Cardiovascular Diseases, Jining, Shandong, China;
4. Department of Ultrasound, Affiliated Hospital of Jining Medical University, Jining, Shandong, China;
5. Deprartment of Cardiology, Jinxiang People's Hospital, Jining, Shandong, China;
6. Clinical Medical College, Jining Medical University, Jining, Shandong, China; and
7. Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China.