Characterisation of 6 or more leucocyte surface antigens by immunofluorescence or immunoenzyme techniques to assess lymphoid or myeloid cell populations for the diagnosis (but not monitoring) of an immunological or haematological malignancy, including a service described in 1 or both of items 71139 and 71141 (if performed), on a specimen of blood, CSF, serous fluid or disaggregated tissue