[1] St Marys Hosp, Immunogenet Lab, Manchester M13 0JH, Lancs, England
[2] Royal Manchester Childrens Hosp, Dept Paediat Haematol Oncol, Manchester M27 1HA, Lancs, England
[3] Royal Manchester Childrens Hosp, CRC, Paedaiat & Canc Family Studies Grp, Manchester M27 1HA, Lancs, England
[4] Christie Hosp, Acad Dept Paediat Oncol, Manchester, Lancs, England