1. Department of Cytopathology Heinrich Heine University Düsseldorf Germany
2. Centre for Child and Adolescent Health HELIOS Klinikum Krefeld Germany
3. German Fanconi Anemia Support Group Eschau Germany
4. Institute of Pathology Heinrich Heine University Düsseldorf Germany
5. Division of Oncology Cancer and Blood Diseases Institute, Cincinnati Children's Hospital Medical Center Cincinnati Ohio USA
6. Department of Clinical Genetics and Human Genetics Amsterdam University Medical Center Amsterdam The Netherlands