1. Department of Cardiology Shandong Provincial Hospital Affiliated to Shandong First Medical University Jinan Shandong China
2. Shandong Provincial Hospital Shandong First Medical University & Shandong Academy of Medical Sciences Jinan Shandong China
3. Clinical Skill Training Center Shandong Provincial Hospital Affiliated to Shandong First Medical University Jinan Shandong China
4. Department of Cardiology Electrocardiogram Room Shandong Provincial Hospital Affiliated to Shandong First Medical University Jinan Shandong China
5. Department of Medical Biotechnology, Faculty of Medicine Mashhad University of Medical Sciences Mashhad Iran