1. Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
2. Faculty of Biology, Albert Ludwigs Universität Freiburg, Freiburg, Germany
3. Wellcome Trust Centre for Cell Biology, Edinburgh, UK
4. Biomedical Center, Core Facility Bioimaging, Ludwig-Maximilians-Universität München, Planegg-Martinsried, Germany