1. Department for Pediatric Oncology and Immunology, Late Effects Surveillance System Center, University Hospital for Children and Adolescents, Erlangen, Germany;
2. Institute of Experimental and Clinical Pharmacology and Toxicology, University of Erlangen-Nuremberg, Erlangen, Germany;
3. Department of Pediatric Hematology and Oncology, Hannover Medical School, Hannover, Germany; and
4. Department of Pediatrics, University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany