1. Department of Internal Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
2. Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
3. Department of Internal Medicine, Washington University, St. Louis, Missouri
4. Department of Internal Medicine, Olive View UCLA Medical Center, Los Angeles, California
5. Division of Infectious Diseases, Vanderbilt University Medical Center, Nashville, Tennessee
6. Division of Cardiac Surgery, Vanderbilt University Medical Center, Nashville, Tennessee.