1. School of Information Science and Engineering, Shandong University, Qingdao, Shandong, China
2. Department of Cardiology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
3. School of Software, Shandong University, Jinan, Shandong, China
4. Department of Cardiology, Shandong Second Provincial General Hospital, Jinan, Shandong, China
5. Department of Ultrasound, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
6. School of Medicine, Shandong University, Jinan, Shandong, China