KiTZ Clinical Trial Unit, Hopp Children's Cancer Center Heidelberg (KiTZ), German Cancer Research Center (DKFZ) and Heidelberg University Hospital, Im Neuenheimer Feld 430, 69120, Heidelberg, Germany. o.witt@kitz-heidelberg.de.
Department of Pediatric Oncology, Hematology and Immunology, Heidelberg University Hospital, Heidelberg, Germany. o.witt@kitz-heidelberg.de.
Clinical Cooperation Unit Pediatric Oncology, German Cancer Research Center (DKFZ) and German Cancer Consortium (DKTK), Heidelberg, Germany. o.witt@kitz-heidelberg.de.