1. Cardiology Division, Department of Medicine, the University of Hong Kong, Hong Kong SAR
2. Department of Echocardiography, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, Chengdu, China
3. Affiliated Hospital of North Sichuan Medical College & Medical Imaging Key Laboratory, Nanchong, China
4. Department of Cardiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
5. Department of Medical Ultrasound, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
6. Wuhan Asian Heart Hospital, Wuhan, China