[1] Leeds Gen Infirm, Acad Unit Haematol & Oncol, HMDS, Leeds LS1 3EX, W Yorkshire, England
[2] Univ Oxford, Nuffield Dept Clin Lab Sci, LRF Lymphoma Antigens Programme, John Radcliffe Hosp, Oxford, England
[3] Univ York, Epidemiol & Genet Unit, York, N Yorkshire, England