1. Department of Pediatrics and Adolescent Medicine; University Medical Center Ulm; Ulm Germany
2. Department of Hematology; Queen's University; Belfast Northern Ireland UK
3. Department of Hematology; University Hospital Coimbra; Coimbra Portugal
4. Department of Pediatrics; Palacky University; Olomouc Czech Republic
5. Department of Hematology; Belfast City Hospital; Belfast Northern Ireland UK
6. Institute of Pathology; Hannover Medical School; Hannover Germany
7. Institute of Hematology and Blood Transfusion; Prague; Czech Republic
8. Department of Medicine and Laboratory Medicine; Örebro University Hospital, and School of Health and Medical Sciences, Örebro University; Örebro Sweden
9. Inserm, UMR892; Université de Nantes; Nantes France