| Affiliation: | 1. Veterans Affairs Medical Center, Washington, DC;2. George Washington University, Washington, DC;3. Uniformed Services University, Washington, DC;4. Georgetown University, Washington, DC;5. MedStar Washington Hospital Center, Washington, DC;6. Medical University of South Carolina, Charleston;7. Ralph H. Johnson Veterans Affairs Medical Center, Charleston, SC;8. Cape Fear Valley Medical Center, Fayetteville, NC;9. Department of Epidemiology, Johns Hopkins University, Baltimore, Md;10. Stony Brook University Hospital, Stony Brook, NY;11. University of California, San Francisco;12. Brigham and Women''s Hospital Heart & Vascular Center, Harvard Medical School, Boston, Mass;13. University of Alabama at Birmingham, Birmingham;14. New York Medical College and Westchester Medical Center, Valhalla, NY;15. University of California, Los Angeles |
