1. Department of Molecular Genetics and Cell Biology, University of Chicago, Chicago, IL 60637
2. Committee on Cell Biology, University of Chicago, Chicago, IL 60637
3. Committee on Development, Regeneration and Stem Cell Biology, University of Chicago, Chicago, IL 60637
4. Robotics Institute, University of Michigan, Ann Arbor, MI 48109
5. Institute for Biophysical Dynamics, University of Chicago, Chicago, IL 60637