1. McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.
2. Medical Scientist Training Program, University of Pittsburgh, Pittsburgh, Pennylvania.
3. Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennylvania.
4. Department of Internal Medicine, Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, Connecticut.
5. Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania.