1. From the Department of Pediatrics, University Hospital Schleswig-Holstein, Kiel; Department of Pediatric Hematology/Oncology and Institute for Cell and Molecular Pathology, Hannover Medical School, Hannover; Department of Hematology, Oncology, and Tumor Immunology, Robert-Rössle-Clinic at the HELIOS Klinikum Berlin-Buch, Charité Medical School, Berlin, Germany; Department of Pediatric Hematology/Oncology, Sackler School of Medicine, Chaim Sheba Medical Center, Ramat Gan, Israel; and Clinical Research and...