1. Mathematical Cell Physiology, Max Delbrück Center for Molecular Medicine, Robert Rössle Straße 10, Berlin 13125, Germany.
2. Department of Pharmacology, University of Cambridge, Tennis Court Road, Cambridge CB2 1PD, UK.
3. Institute for Theoretical Biology, Charité-Universitätsmedizin Berlin, Invalidenstraße 43, Berlin 10115, Germany.
4. Department of Pharmacology and Physiology, New Jersey Medical School, Rutgers, The State University of New Jersey, 185 South Orange Avenue, Newark, NJ 07103, USA.
5. Luxembourg Centre for Systems Biomedicine, 7 Avenue des Hauts Fourneaux, Esch sur Alzette 4362, Luxembourg.
6. National Center for Microscopy and Imaging Research, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA.
7. Department of Physics, Humboldt University Berlin, Newtonstraße 15, Berlin 12489, Germany.