1. Department of Radiology; The Ohio State University; Columbus Ohio USA
2. The Dorothy M. Davis Heart and Lung Research Institute and the Division of Cardiovascular Medicine, The Ohio State University; Columbus Ohio USA
3. College of Public Health; The Ohio State University; Columbus Ohio USA
4. Department of Clinical Sciences Division of Biostatistics; University of Texas, Southwestern Medical Center; Dallas Texas USA
5. Department of Medicine Division of Cardiology; The University of Maryland; Baltimore Maryland USA