1. Division of Cardiovascular Medicine and the Vascular Center; University of California; Davis California
2. Department of Cardiology; National Heart Centre Singapore; Singapore, Singapore
3. Division of Cardiology; VA Eastern Colorado Healthcare System; Denver Colorado
4. Division of Cardiovascular Medicine; University of California; Davis California
5. Department of Medicine; Massachusetts General Hospital; Boston Massachusetts
6. Division of Vascular and Endovascular Surgery; NYU Langone Medical Center; New York New York
7. Division of Biostatistics, Department of Public Health Sciences; University of California; Davis California
8. Department of Internal Medicine; University of California; San Francisco California
9. Department of Veterans Affairs; Northern California Health Care System; Mather California