1. The Royal Free Hospital and School of Medicine, London,
2. Great Ormond Street Hospital for Children, London,
3. Hospices Civils de Strasbourg, Strasbourg,
4. Institut Jules Bordet, Brussels,,
5. The Norwegian Institute for Cancer Research, Oslo,
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7. The Royal Marsden Hospital, London and Sutton,
8. Guy's Hospital, London,
9. Hôpital Erasme, Brussels,
10. Bristol Royal Hospital for Sick Children, Bristol,
11. Royal Manchester Children's Hospital Pendlebury,
12. The Children's Hospital, Birmingham,
13. Royal Hospital for Sick Children, Glasgow