[1] Royal Marsden NHS Fdn Trust, Sect Haematooncol, London, England
[2] St Thomas Hosp, St Johns Inst Dermatol, London, England
[3] Univ Hosp Birmingham, Dept Dermatol, Birmingham, W Midlands, England
[4] Bristol Royal Hosp Children, Dept Haematol, Bristol, Avon, England
[5] Gartnavel Hosp, Beatson Oncol Ctr, Bone Marrow Transplant Unit, Glasgow, Lanark, Scotland
[6] Great Ormond St Hosp Sick Children, Dept Bone Marrow Transplantat, London, England
[7] Freeman Rd Hosp, Dept Haematol, Newcastle Upon Tyne NE7 7DN, Tyne & Wear, England
[8] Univ Hosp Birmingham, Dept Haematol, Birmingham, W Midlands, England
[9] Rotherham Gen Hosp, Dept Haematol, Rotherham, S Yorkshire, England
[10] Royal Brompton Hosp, Dept Resp Med, London SW3 6LY, England
[11] UCL, Inst Ophthalmol, Moorfields Eye Hosp, London, England
[12] Barts & London NHS Trust, Dept Oral Med, London, England
[13] Royal Free Hampstead NHS Trust, Dept Med Microbiol, London, England
[14] Royal Marsden NHS Fdn Trust, Dept Med, London, England
[15] St George Hosp, Paediat Endocrine Unit, London, England
[16] Kings Coll Hosp London, Paediat Liver Serv, London, England
[17] Kings Coll Hosp London, Inst Liver Studies, London SE5 8RX, England
[18] Anthony Nolan, London, England