[1] Univ Oxford, John Radcliffe Hosp, Med Sch, Oxford, England
[2] Oxford Univ Hosp NHS Fdn Trust, Dept Neuropathol, Oxford, England
[3] Oxford Univ Hosp NHS Fdn Trust, Dept Haematol, Oxford, England
[4] Oxford Univ Hosp NHS Fdn Trust, Dept Cellular Pathol, Oxford, England