1. Registrar, Dept. of Haematology, Royal Hospital for Sick Children, 17 Millerfield Place, Edinburgh EH9 1LF
2. Registrar, Dept. of Haematology, Royal Infirmary, Lauriston Place, Edinburgh.
3. Consultant Surgeon, Royal Hospital for Sick Children, Sciennes Road, Edinburgh EH9 1LF.
4. Consultant Haematologist/Oncologist, Dept. of Haematology, Royal Hospital for Sick Children, 17 Millerfield Place, Edinburgh EH9 1LF.