1. Division of Stem Cell Transplantation and Immunotherapy, Department of Medicine II, Christian Albrechts University of Kiel, Kiel, Germany, and University Hospital Schleswig-Holstein, Campus Kiel, Germany
2. Pediatric Hematology/Oncology, ALL-BFM Study Group, Christian Albrechts University of Kiel, Kiel, Germany, and University Hospital Schleswig-Holstein, Campus Kiel, Germany