1. Clinical and Experimental Haematology Unit; G Gaslini Childrens' Hospital; Genova Italy
2. Paediatric Haemato-Oncology Clinic; University of Padova; Italy
3. Department of Haematology; Hopital St Louis; Paris France
4. Basel University Hospital; Basel Switzerland
5. Second Division of Haematology; San Martino Hospital; Genova Italy
6. Haematology; Department of Clinical Medicine and Surgery; Federico II University of Naples; Italy
7. Institute for Clinical Transfusion Medicine and Immunogenetics and Department of Transfusion; Medicine University of Ulm; Germany
8. Paediatric Haemtopoietic Stem Cell Transplantation; St Anna Kinderspital; Vienna Austria
9. Department of Haematological Medicine; King's College Hospital/King's College; London UK
10. EBMT Data Office; University Medical Centre; Leiden The Netherlands
11. Great Ormond Street Children's Hospital; London UK
12. Bone Marrow and Stem Cell Transplantation Program; King Hussein Cancer Centre; Amman Jordan
13. King Faisal Specialist Hospital & Research Centre; Riyadh Saudi Arabia