[1] Salford Royal Hosp, Dept Histopathol, Salford, Lancs, England
[2] Christie Hosp, Dept Histopathol, Manchester, Lancs, England
[3] Christie Hosp, Dept Cytogenet, Manchester, Lancs, England
[4] Salford Royal Hosp, Dept Haematol, Salford, Lancs, England