1. Department of Cardiology, Shandong Provincial Hospital affiliated to Shandong University, Shandong, PR China
2. Department of Thoracic Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Shandong, PR China
3. Department of Vascular Surgery, Shandong Provincial Hospital affiliated to Shandong University, Shandong, PR China
4. Department of Obstetrics, Weifang Yidu Central Hospital, Shandong, PR China
5. Department of Cardiology, Nanjing Drum Tower Hospital, Jiangsu, PR China
6. Department of Medical Imaging, Shandong Provincial Hospital affiliated to Shandong University, Shandong, PR China
7. Department of Cardiology, The Second Affiliated Hospital of Zhengzhou University, Henan, PR China
8. Department of Cardiology, Zibo Zhoucun People's Hospital, Shandong, PR China
9. Department of Cardiology, Taian City Central Hospital, Shandong, PR China