1. a Cox Laboratory for Biomedical Engineering, Institute of Biosciences and Bioengineering and Department of Chemical Engineering, Rice University, 6100 S. Main, Houston, TX 77005-1892, USA
2. b Department of Orthopaedic Surgery, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA
3. c Cox Laboratory for Biomedical Engineering, Institute of Biosciences and Bioengineering and Department of Chemical Engineering, Rice University, 6100 S. Main, Houston, TX 77005-1892, USA
4. d Cox Laboratory for Biomedical Engineering, Institute of Biosciences and Bioengineering and Department of Chemical Engineering, Rice University, 6100 S. Main, Houston, TX 77005-1892, USA
5. e Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
6. f Orthopaedic Biomechanics Laboratory, Beth Israel Hospital, Harvard Medical School, Boston, MA 02215, USA
7. g Polymer Branch, WL/MLBP, Materials Directorate, Wright Laboratory, 2941 P Street Ste 1, Wright-Patterson AFB, OH 45433-7750, USA
8. h Department of Chemistry, MS-60, Rice University, 6100 S. Main, Houston, TX 77005-1892, USA
9. i Department of Chemistry, MS-60, Rice University, 6100 S. Main, Houston, TX 77005-1892, USA
10. j Cox Laboratory for Biomedical Engineering, Institute of Biosciences and Bioengineering and Department of Chemical Engineering, Rice University, 6100 S. Main, Houston, TX 77005-1892, USA