1. Institute of Physiology, University of Zurich, Zurich 8057, Switzerland
2. Department of Chemistry, University of Zurich, Zurich 8057, Switzerland
3. Center for Microscopy and Image Analysis, University of Zurich, Zurich 8057, Switzerland
4. Institute of Anatomy, University of Zurich, Zurich 8057, Switzerland
5. Department of Health Sciences & Technology, ETH Zurich, Zurich 8092, Switzerland