1. Department of Medicine Uniformed Services University of the Health Sciences Bethesda Maryland USA
2. Clinical Investigation Facility David Grant USAF Medical Center Travis AFB California USA
3. Division of Cardiology Mercy Medical Center Redding Virginia USA
4. Bexar Data Limited San Antonio Texas USA
5. Department of Public Health University of Texas San Antonio San Antonio Texas USA
6. Military Cardiovascular Outcomes Research (MiCOR) Uniformed Services University Bethesda Maryland USA