1. Scientific Registry of Transplant Recipients; Minneapolis Medical Research Foundation; Minneapolis MN
2. Department of Medicine, Division of Cardiology; University of Minnesota; Minneapolis MN
3. Department of Pediatrics; University of Washington; Seattle WA
4. Organ Procurement and Transplantation Network; Richmond VA
5. United Network for Organ Sharing; Richmond VA
6. Center for Outcomes Research; Saint Louis University School of Medicine; St. Louis MO
7. Department of Epidemiology and Community Health; University of Minnesota; Minneapolis MN