1. Department of Chemical Engineering, Vanderbilt University, Nashville, Tennessee.
2. Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania.
3. Department of Biological Sciences, Duquesne University, Pittsburgh, Pennsylvania.
4. Hopkins Technology Commercialization Agency, the Johns Hopkins University, Baltimore, Maryland.
5. Bone Tissue Engineering Center, Carnegie Mellon University, Pittsburgh, Pennsylvania.
6. Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania.