1. Department I—General Pediatrics, Hematology and Oncology, University Children's Hospital Tübingen, Tübingen, Germany.
2. Experimental and Clinical Research Center, GMP-Facility for Cellular Therapies, Charité Universitätsmedizin Berlin, Campus Berlin Buch, Berlin, Germany.
3. Department of Pediatric Hematology and Oncology, University of Würzburg, Würzburg, Germany.
4. Department of Pediatric Hematology and Oncology, University Hospital Heidelberg, Heidelberg, Germany.
5. Department of Pediatric Hematology and Oncology, Hannover Medical School, Hannover, Germany.
6. University Hospital and Comprehensive Cancer Center Tübingen, Universitätsklinikum Tübingen, Tübingen, Germany.
7. Division for Pediatric Stem Cell Transplantation and Immunology, Clinic for Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.