1. Cardiac Ultrasound Laboratory; Division of Cardiology; Department of Medicine; Massachusetts General Hospital and Harvard Medical School; Boston Massachusetts
2. Division of Adult Echocardiography; Guangdong Provincial Cardiovascular Institute; Guangdong General Hospital and Guangdong Academy of Medical Sciences; Guangzhou China
3. Blacktown Clinical School; Department of Cardiology; Faculty of Medicine; University of Western Sydney; Sydney NSW Australia
4. School of Medical Sciences; Faculty of Medicine; University of New South Wales; Sydney NSW Australia
5. Department of Radiation Oncology; Massachusetts General Hospital and Harvard Medical School; Boston Massachusetts
6. Institute for Technology Assessment; Massachusetts General Hospital and Harvard Medical School; Boston Massachusetts