1. Johns Hopkins University, Department of Cardiology; Baltimore Maryland USA
2. Oslo University Hospital, Department of Cardiology; Oslo Norway
3. National Heart, Lung and Blood Institute, Office of Biostatistics Research; Bethesda Maryland USA
4. UCLA School of Medicine, Department of Radiology; Los Angeles California USA
5. Wake Forest University Health Sciences, Department of Cardiology; Winston-Salem North Carolina USA
6. Columbia University, Department of Radiology; New York New York USA
7. Columbia University, Departments of Medicine and Epidemiology; New York New York USA
8. Northwestern University Medical School, Department of Preventive Medicine; Chicago Illinois USA
9. National Institutes of Health Clinical Center; National Institute of Biomedical Imaging and Bioengineering; Bethesda Maryland USA.