1. Department of Materials Science and Engineering Cornell University Ithaca NY USA
2. Sibley School of Mechanical Engineering Cornell University Ithaca NY USA
3. Division of Endocrinology, Gerontology, and Metabolism Stanford University School of Medicine Palo Alto CA USA
4. Division of Endocrinology, Diabetes & Metabolism Johns Hopkins University School of Medicine Baltimore MD USA
5. Research Division Hospital for Special Surgery New York NY USA