1. 1Department of Pediatric and Adolescent Medicine, Aarhus University Hospital, Aarhus, Denmark
2. 2Children’s Cancer Center, Queen Silvia’s Children’s Hospital, Göteborg, Sweden
3. 3Department of Pediatric Oncology and Hematology, Jagiellonian University Medical College, Institute of Pediatrics, Krakow, Poland
4. 4Toulouse-Oncopole, Laboratoire d’Hématologie secteur Génétique des Hémopathies, Toulouse, France
5. 52nd Department of Pediatrics, Semmelweis University, Budapest, Hungary
6. 6New Children’s Hospital, Pediatric Research Center, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
7. 7Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE
8. 8Hopital Armand Trousseau, Assistance Publique–Hôpitaux de Paris, Service d’hematologie et d’oncologie pediatrique, Paris, France
9. 9Department of Pediatric Haematology/Oncology and Cell and Gene Therapy, IRCCS Ospedale Pediatrico Bambino Gesù, Catholic University of the Sacred Heart, Rome, Italy
10. 10Dipartimento di Scienze Mediche e Chirurgiche, Pediatric Oncology and Hematology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
11. 11Department of Clinical Sciences, Pediatrics, Umeå University, Umeå, Sweden
12. 12St Jude Children’s Research Hospital, Memphis, TN
13. 13Department of Pediatric Hematology-Oncology, Pediatrics III, University Hospital of Essen, Essen, Germany
14. 14Faculty of Health Sciences, Laboratory of Clinical Hematology, Department of Medical Technology, Kyorin University, Mitaka, Japan
15. 15Division of Leukemia and Lymphoma, Children’s Cancer Center, National Center for Child Health and Development, Tokyo, Japan
16. 16Department of Pediatric Hematology and Oncology, Oslo University Hospital, Oslo, Norway
17. 17Department of Hematology, Hemodiagnostic Laboratory, Aarhus University Hospital, Aarhus, Denmark