1. The Stem Cell and Chromatin Group, Laboratory of Biology, The University of Ioannina, School of Medicine and The Institute of Biomedical Research (FORTH/BRI), 45 110 Ioannina, Greece
2. Advanced Light Microscopy Facility (ALMF), European Molecular Biology Laboratory, D-69117 Heidelberg, Germany
3. Children's Hospital Oakland Research Institute, 5700 Martin Luther King Jr Way, Oakland, CA 94609, USA
4. Tissue Fibrosis and Remodelling Group MRC/University of Edinburgh Centre for Inflammation Research, The Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
5. The Division of Tumor Biology, Department of Immunology and Cell Biology, Forschungszentrum Borstel, D-23845 Borstel, Germany