1. Transplantation Section, Department of Surgery, Children's Hospital of Pittsburgh, Center for Innovative Regenerative Therapies, University of Pittsburgh, Pittsburgh, Pennsylvania.
2. McGowan Institute for Regenerative Medicine, Pittsburgh, Pennsylvania.
3. Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania.
4. Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania.
5. Center for Biologic Imaging, University of Pittsburgh Medical School, Pittsburgh, Pennsylvania.
6. Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania.