1. Department of Medicine, Cardiovascular Division; Medical University of South Carolina; Charleston South Carolina
2. Thoratec Corporation; Pleasanton California
3. Duke University Medical Center; Durham North Carolina
4. Abbott Northwestern Hospital; Morehouse School of Medicine and the Georgia Institute of Technology; Minneapolis Minnesota
5. Yale University School of Medicine; New Haven Connecticut
6. Barnes-Jewish Hospital; St. Louis Missouri
7. University of Louisville; Louisville Kentucky
8. Perelman School of Medicine at the University of Pennsylvania; Philadelphia Pennsylvania