1. Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
2. McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
3. Department of Surgery and School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
4. Department of Immunology, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
5. Thomas E. Starzl Transplantation Institute, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.