1. Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, Michigan.
2. Department of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan.
3. Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan.
4. Medsport Sports Medicine Program, Orthopaedic Surgery, University of Michigan, Ann Arbor, Michigan.
5. Program in Cellular and Molecular Biology, University of Michigan, Ann Arbor, Michigan.
6. Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan.
7. Program in Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan.