1. Department of Cardiovascular and Thoracic Surgery; University of Texas Southwestern Medical Center; Dallas TX
2. Department of Medicine; Duke University; Durham NC
3. United Network for Organ Sharing; Richmond VA
4. Department of Pediatrics; Vanderbilt University School of Medicine; Nashville TN
5. Department of Medicine; University of Wisconsin School of Medicine; Madison WI
6. Department of Surgery; Emory University School of Medicine; Atlanta GA
7. Department of Medicine; Newark Beth Israel Medical Center; Newark NJ
8. Department of Surgery; University of Colorado School of Medicine; Denver CO