1. Department of Bioengineering, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.
2. Division of Plastic Surgery, Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania.
3. Division of Plastic Surgery, Department of Surgery, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.
4. McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.
5. Department of Chemical Engineering, University of Washington, Seattle, Washington.