1. Niels Bohr International Academy, Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, DK-2100 Copenhagen, Denmark
2. Center for Models of Life, Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, DK-2100 Copenhagen, Denmark
3. Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, USA
4. Princeton Institute for the Science and Technology of Materials, Princeton University, Princeton, New Jersey 08544, USA
5. Division of Biology and Biological Engineering, California Institute of Technology, 1200 E. California Boulevard, Pasadena, California 91125, USA