1 Department of Pediatrics I, ALL-BFM Study Group, Christian-Albrechts University Kiel and University Medical Center Schleswig-Holstein, Kiel, Germany.
2 Department of Medicine II, University Hospital Schleswig-Holstein, Kiel, Germany.
3 Department of Pathology, Section of Pediatric Pathology, University Hospital Bonn, Germany.
4 Department of Pathology, Hematopathology Section and Lymph Node Registry, Christian-Albrechts University Kiel and University Medical Center Schleswig-Holstein, Kiel, Germany.
5 Genentech Research and Early Development, San Francisco, CA, USA.
6 Institute of Molecular and Clinical Immunology, Medical Faculty, Otto-Von-Guericke University Magdeburg, Germany.
7 Molecular and Experimental Surgery, Clinic for General, Visceral, Vascular, and Transplant Surgery, Medical Faculty, University Hospital Magdeburg, Germany.
8 Department of Medicine II, Division of Antibody-Based Immunotherapy, Christian-Albrechts University Kiel and University Medical Center Schleswig-Holstein, Kiel, Germany.
9 Department of Medicine II, Section for Stem Cell Transplantation and Immunotherapy, Christian-Albrechts University Kiel and University Medical Center Schleswig-Holstein, Kiel, Germany.
10 Institute of Immunology, Ulm University Medical Center, Ulm, Germany.
11 Department of Pediatrics, Otto-von-Guericke-University, Magdeburg, Germany.