1. Laboratory for Medical Immunology Department of Immunology Erasmus MC University Medical Center Rotterdam Rotterdam The Netherlands
2. Tettamanti Research Center Pediatric Clinic University of Milano Bicocca Monza (MB) Italy
3. Department of Hematology University of Schleswig‐Holstein, Campus Kiel Kiel Germany
4. Princess Máxima Center for Pediatric Oncology Utrecht The Netherlands
5. Department of Microbiology and Immunology Medical University of Silesia in Katowice Zabrze Poland
6. Department of Pediatric Hematology and Oncology, Zabrze Medical University of Silesia in Katowice Katowice Poland
7. Translational and Clinical Research program Cancer Research Centre (IBMCC, CSIC‐USAL) Cytometry Service NUCLEUS Salamanca Spain
8. Department of Medicine University of Salamanca (USAL) Salamanca Spain
9. Institute of Biomedical Research of Salamanca (IBSAL) Salamanca Spain
10. Biomedical Research Networking Centre Consortium of Oncology (CIBERONC) Instituto de Salud Carlos III Madrid Spain
11. Department of Diagnostic Sciences Ghent University Ghent Belgium
12. Department of Laboratory Medicine Ghent University Hospital Ghent Belgium
13. Pediatrics Institute IPPMG Faculty of Medicine Federal University of Rio de Janeiro Rio de Janeiro Brazil
14. CLIP‐Department of Pediatric Hematology and Oncology Second Faculty of Medicine Charles University and University Hospital Motol Prague Czech Republic
15. Department of Immunohematology and Blood Transfusion (IHB) University Medical Center (LUMC) Leiden the Netherlands