1 Pediatric Oncology Unit, Fondazione IRCCS Istituto Nazionale Tumori, 20133 Milan, Italy. Electronic address: andrea.ferrari@istitutotumori.mi.it.
2 Department of Pediatrics, Stanford University School of Medicine, Palo Alto, CA, USA.
3 Klinikum der Landeshaupstadt Stuttgart gKAöR, Olgahospital, Stuttgard, Germany; Medizinische Fakultät der Universität Tübingen, Tübingen, Germany.
4 Department of Hematology, Oncology, and Stem Cell Transplant, Ann & Robert H Lurie Children's Hospital of Chicago, Chicago, IL, USA.
5 Hopp Children's Cancer Center Heidelberg, Heidelberg, Germany; Division of Pediatric Neurooncology, German Cancer Research Center and German Cancer Consortium, Heidelberg, Germany; Department of Pediatric Oncology, Hematology, and Immunology, Heidelberg University Hospital, Heidelberg, Germany.
6 Department of Pediatrics, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA.
7 SIREDO Oncology Center, PSL University, Institut Curie, Paris, France.
8 Department of Pediatrics, Maine Medical Center, Portland, ME, USA.