1. Division of Genetics and Genomics, Roslin Institute, University of Edinburgh, Midlothian EH25 9PS, Scotland, UK
2. Division of Immunoepigenetics, Department of Immunology and Cell Biology, Research Center Borstel, D-23845 Borstel, Germany
3. Department of Development and Genetics, Uppsala University, S-75236 Uppsala, Sweden
4. Division of Molecular Immunology, National Institute of Medical Research, London NW7 1AA, England, UK
5. School of Biological Sciences, University of Liverpool, Liverpool L69 7ZB, England, UK
6. Department of Anatomy and Cell Biology, University of Ulm, D-89069 Ulm, Germany
7. Clinic of Obstetrics and Gynecology, Laboratory of Oncology, University Hospital Schleswig-Holstein, D-24105 Kiel, Germany
8. Department of Radiation Oncology, Washington University School of Medicine, St. Louis, MO 63108