* Corresponding authors

^a Department of Chemical and Biological Engineering, University of Colorado Boulder, 3415 Colorado Ave, Boulder, CO 80303, USA
E-mail: benjamin.richardson@colorado.edu, kristi.anseth@colorado.edu

^b The BioFrontiers Institute, University of Colorado Boulder, 3415 Colorado Ave, Boulder, CO 80303, USA

^c Materials Science and Engineering Program, University of Colorado Boulder, 4001 Discovery Drive, Boulder, CO 80303, USA

^d Department of Orthopedic Surgery, Massachusetts General Hospital, Harvard Medical School, 55 Fruit St, WAC 435, Boston, MA 02114, USA

^e Division of Plastic Surgery, Massachusetts General Hospital, Harvard Medical School, 15 Parkman St, WACC 453, Boston, MA 02114, USA