1. Transplantation Biology Program, Mayo Clinic, Rochester, Minnesota.
2. Department of Physiology, Mayo Clinic, Rochester, Minnesota.
3. Department of Surgery, Kyoto University Hospital, Kyoto, Japan.
4. Department of Thoracic Surgery, Tokyo Medical University, Tokyo, Japan.
5. Department of Immunology, Mayo Clinic, Rochester, Minnesota.
6. Department of Surgery, Mayo Clinic, Rochester, Minnesota.
7. Department of Pediatrics, Mayo Clinic, Rochester, Minnesota.