1. Cell Biology and Biophysics Unit, European Molecular Biology Laboratory, Heidelberg, Germany.
2. Cell Biology, Neurobiology and Biophysics, Department of Biology, Faculty of Science, Utrecht University, Utrecht, Netherlands.
3. Faculty of Biosciences, University of Heidelberg, Heidelberg, Germany.
4. Genome Biology Unit, European Molecular Biology Laboratory, Heidelberg, Germany.
5. Abberior Instruments GmbH, Göttingen, Germany.
6. EMBL Imaging Centre, European Molecular Biology Laboratory, Heidelberg, Germany.
7. Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM, USA.
8. The FIRC Institute of Molecular Oncology, Milano, Italy.