1. Department of Hematology and Oncology, Johann Wolfgang Goethe University, Frankfurt, Germany;
2. Department of Hematology and Oncology and
3. Department of Pediatrics, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany;
4. Department of Hematology, University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany;
5. Department of Hematology and Oncology, University Hospital Essen, Essen, Germany;
6. Department of Hematology and Oncology, University Hospital Freiburg, Freiburg, Germany;
7. Department of Hematology and Oncology, University Hospital Mainz, Mainz, Germany;
8. Department of Hematology and Oncology, University Hospital Münster, Münster, Germany;
9. Department of Internal Medicine III, University Hospital Ulm, Ulm, Germany;
10. Department of Biomedical Statistics, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; and
11. Division of Cancer and Genetics, Cardiff University, Cardiff, United Kingdom